Of the more than 1,600 available cryptocurrencies on the market, Bitcoin and Ethereum are both in the top three. And Ethereum may overtake Bitcoin in 2018, according to Forbes, which cites the platform’s aggressive growth. But how exactly does Ethereum stack up against Bitcoin in terms of features, uses, and more? Simplilearn’s Bitcoin vs. Ethereum tutorial video covers the similarities and differences between these two cryptocurrencies, and here we’ll recap what’s included in the video.
In 1999, Nobel Prize winner in economics Milton Friedman believed the Internet was going to be one of the major forces in reducing the role of government. He also thought that the one thing missing was reliable electronic cash, and just as he predicted, in 2009 the cryptocurrency Bitcoin was born.
What is Cryptocurrency?
Before going into the Bitcoin vs. Ethereum debate and trying to find out if Ethereum is better than Bitcoin, you must first know about cryptocurrencies. Cryptocurrency works in a very similar way to “normal” currency (the dollar, Euro, Pound, yen, rupee, and so on). Any form of currency that isn’t a cryptocurrency falls under the banner of normal currency, also known as fiat currency.
The major difference between cryptocurrencies and fiat currencies is that cryptocurrencies are decentralized. This means that cryptocurrencies don’t have a central authority, such as a bank or government, controlling them. In a way, cryptocurrency works in a very democratic fashion: any change that needs to take place is done only after a majority of the people using the cryptocurrency agree to it.
What is Cryptocurrency
Cryptocurrencies and fiat currencies are similar because both were created as a medium of exchange. However, that’s where the similarity ends. With cryptocurrencies, third parties are not involved. With fiat currencies, you have banks, money lenders, governments, and so on. And cryptocurrencies have cryptographic functions to ensure that the transactions are kept secure. Bitcoin, for example, uses the SHA-256 algorithm to ensure security.
But most important, cryptocurrencies use blockchain, which is a set of records that are placed into a container known as a block. These transactions are kept public and in chronological order.
Blockchain Career Guide
A Guide to Becoming a Blockchain DeveloperDOWNLOAD NOWBlockchain Career Guide
What is Bitcoin?
Bitcoin, which was released in 2009 by an individual or group of individuals known as Satoshi Nakamoto, is a cryptocurrency that allows people to send and receive money around the world. As mentioned, the payments are secured using cryptography. The most essential point about Bitcoin is that it helps keep the identity of the people sending and receiving money anonymously.
The transaction fee is also very low. We all know that when we do a transaction through a bank, some amount of money or service charge is levied. However, with Bitcoin, this charge is very low.
What is Bitcoin?
What is Ethereum?
Ethereum, which was created in 2015 by Vitalik Buterin, is a cryptocurrency that provides ether tokens. This is equivalent to bitcoins in the Bitcoin network. Ether is used to build and deploy decentralized applications whose back-end code is placed in a distributed peer-to-peer network. This is different from a regular application, for which the back-end code is placed in a centralized server. Ether is also used to pay for services, like the computational power that is required before a block can be added to the blockchain and to pay transaction fees.
Ether works very similarly to Bitcoin and can be used for peer-to-peer payments. Also, it can be used to create smart contracts. Smart contracts work in such a way that when a specific set of predefined rules is satisfied, a particular output takes place.
What is Ethereum?
Bitcoin vs. Ethereum
This argument of Bitcoin vs. Ethereum has been gaining great hype in recent times. Bitcoin has become a very popular and well-known cryptocurrency around the world. It also has the highest market cap among all the cryptocurrencies available right now. In a way, it’s the current world champion when it comes to cryptocurrencies. On the other side is Ethereum. Ethereum did not have the revolutionary effect that Bitcoin did, but its creator learned from Bitcoin and produced more functionalities based on the concepts of Bitcoin. It is the second-most-valuable cryptocurrency on the market right now.
Bitcoin and Ethereum by the numbers
History
Bitcoin was the first cryptocurrency to be created; as mentioned, it was released in 2009 by Satoshi Nakamoto. It is not known if this is a person or group of people, or if the person or people are alive or dead. Ethereum, as noted above, was released in 2015 by a researcher and programmer named Vitalik Buterin. He used the concepts of blockchain and Bitcoin and improved upon the Bitcoin platform, providing a lot more functionality. He created the Ethereum platform for distributed applications and smart contracts.
Concepts
Bitcoin enables peer-to-peer transactions. It acts as a replacement for fiat currencies but doesn’t have all the problems associated with fiat currencies. You don’t have to pay high transaction fees, and you also don’t have a centralized authority that regulates how bitcoins work.
Ethereum enables peer-to-peer transactions as well, but it also provides a platform for creating and building smart contracts and distributed applications. A smart contract allows users to exchange just about anything of value: shares, money, real estate, and so on.
Mining
In Bitcoin, miners can validate transactions with the method known as proof of work. This is the same in Ethereum. With proof of work, miners around the world try to solve a complicated mathematical puzzle to be the first one to add a block to the blockchain. Ethereum, however, will be moving to something known as proof of stake. With proof of stake, a person can mine or validate transactions in a block based on how many coins he owns. The more coins a person holds, the more mining power he will have.
In Bitcoin, every time a miner adds a block to the blockchain, he is rewarded with 12.5 bitcoins. This reward is expected to be halved every 210,000 blocks. The next time the reward will be halved will be in 2020; the reward will then be reduced from 12.5 bitcoins to 6.25 bitcoins per block. In Etherium a miner, or validator, receives a value of 3 ether every time a block is added to the blockchain, and the reward will never be halved.
Fees
The transaction fees in Bitcoin are entirely optional. You can pay the miner more money to have him pay special attention to your transaction; however, the transaction will go through even if you don’t pay a fee. On the other hand, you must provide some amount of ether for your transaction to be successful on Ethereum. The ether you offer will get converted into a unit called gas. This gas drives the computation that allows your transaction to be added to the blockchain.
Time
As for the average amount of time it takes to add a block to the blockchain, in Bitcoin it takes 10 minutes. In Ethereum, it takes only about 12 to 15 seconds.
Hashing Algorithms
Hashing algorithms are how these systems can maintain their privacy and ensure security. Bitcoin uses a hashing algorithm known as SHA-256. Ethereum uses a cryptographic algorithm called Ethash.
By the Numbers
Bitcoin has 17 million bitcoins, and Ethereum has 101 million ether. Now even though Ethereum has easily crossed the 100 million mark, the market capitalization for Bitcoin is $110 billion, whereas for Ethereum it’s only $28 billion. So even though Ethereum has more coins on the market, it isn’t at the level of Bitcoin.
The number of Bitcoin transactions that take place in a day is about 219,000; for Ethereum, it’s about 659,000. As for the number of blocks that have been created, for Bitcoin, it’s about 537,000, and for Ethereum it’s about 6 million. This has a lot to do with the fact that it takes a lot less time for a block to be added to Ethereum than to Bitcoin.
The block size is 628.286 kilobytes for Bitcoin and 25.134 kilobytes for Ethereum.
And while the market value of Bitcoin is significantly higher than that of any form of digital currency on the market right now, it is closely followed by Ethereum, which hopes to take over one day.
Blockchain Certification Training Course
Gain expertise in core Blockchain conceptsVIEW COURSEBlockchain Certification Training Course
Bitcoin or Ethereum: Which one is Better?
The answer to the question on which one is better in the argument between Bitcoin vs. Ethereum, it depends entirely on your requirements. While, Bitcoin works better as a peer-to-peer transaction system, and Ethereum works well when you need to create and build distributed applications and smart contracts. The choice is entirely up to you to choose a winner between Bitcoin vs. Ethereum.
Conclusion
If you’d like to learn more about cryptocurrency and blockchain technology—and perhaps earn an increase in salary or land a more exciting job—check out Simplilearn’s Blockchain Basics course or go even further and take your career to the next level with the Blockchain Certification training. There has never been a better time to learn about blockchain and cryptocurrency!
Disadvantages of Cloud Miningbitcoin доллар
обмен monero
How Can You Make Bitcoin Mining Profitable?bitcoin протокол love bitcoin bitcoin blog tether 4pda bitcoin purse tether mining смесители bitcoin
bitcoin simple secp256k1 bitcoin bitcoin xbt bitcoin legal monero windows
ethereum mine supernova ethereum bitcoin биржи переводчик bitcoin обмена bitcoin bitcoin bitcointalk monero cryptonote
bitcoin ротатор tether майнинг bitcoin рухнул bitcoin client bitcoin minecraft daily bitcoin ethereum faucets bit bitcoin обзор bitcoin bitcoin продать кошельки ethereum
icon bitcoin bitcoin комиссия bitcoin mt5 card bitcoin приложение bitcoin bitcoin iso bitcoin database токен ethereum 777 bitcoin bitcoin график bitcoin hunter matteo monero обзор bitcoin ethereum core ethereum torrent форки ethereum hashrate bitcoin bitcoin online порт bitcoin деньги bitcoin bitcoin links bitcoin trading список bitcoin bitcoin котировки bitcoin multiplier bitcoin государство bitcoin legal
stealer bitcoin bitcoin capitalization ethereum solidity сбор bitcoin bitcoin gadget bitcoin pattern Bitcoin is a virtual currency that gained recognition after its price-per-coin rose above $13,000 in early 2018. The cryptocurrency (one of many) is at the center of a complex intersection of privacy, banking regulations, and technological innovation. Today, some retailers accept bitcoin, while in other jurisdictions, bitcoin is illegal.store bitcoin bitcoin card ethereum mining майнер bitcoin plasma ethereum advcash bitcoin
bitcoin рбк github ethereum сеть ethereum bitcoin minecraft ethereum получить форки ethereum As proper validation and smart contracts become more vital to today’s businesses, Ethereum has positioned itself to be able to address this growing need in an increasingly tech-dependent world.What is Ethereum?брокеры bitcoin bitcoin cap bitcoin icons multiplier bitcoin bitcoin fees bitcoin click bus bitcoin bitcoin transaction
ethereum node bitcoin казахстан ethereum zcash litecoin bitcoin ethereum course bitcoin регистрация история ethereum bitcoin chart карты bitcoin
blogspot bitcoin bitcoin moneypolo
bitcoin express ethereum studio bitcoin rotator tether перевод trade cryptocurrency elena bitcoin bitcoin ticker bitcoin history
bitcoin main bitcoin novosti bitcoin кошелек криптовалюта monero bitcoin transaction hd bitcoin обзор bitcoin bitcoin окупаемость bitcoin фермы история ethereum In the history of Bitcoin, there has never been an attack on the block chain that resulted in stolen money from a confirmed output. Neither has there ever been a reported theft resulting directly from a vulnerability in the original Bitcoin client, or a vulnerability in the protocol. Bitcoin is secured by standard cryptographic functions. These functions have been peer reviewed by cryptography experts and are considered unlikely to be breakable in the foreseeable future.flash bitcoin escrow bitcoin яндекс bitcoin казино ethereum wifi tether monero майнить bitcoin payza bitcoin обменник bitcoin links bus bitcoin bitcoin чат bitcoin лохотрон bitcoin btc курс ethereum цена ethereum
ethereum алгоритмы xbt bitcoin bitcoin кошельки доходность ethereum bitcoin gadget cryptocurrency index
froggy bitcoin запуск bitcoin bitcoin вклады обмен bitcoin cryptocurrency nem 600 bitcoin динамика bitcoin cryptocurrency calendar bitcoin продам bitcoin 2048 покупка ethereum bitcoin картинки ethereum обвал bitcoin софт talk bitcoin ethereum io bitcoin прогнозы ethereum клиент автомат bitcoin tp tether currency bitcoin api bitcoin
forum ethereum биржа bitcoin форки ethereum 999 bitcoin claim bitcoin 123 bitcoin wikipedia ethereum монета ethereum instant bitcoin xpub bitcoin bitcoin руб bitcoin основы bitcoin dogecoin яндекс bitcoin bitcoin machines вебмани bitcoin пополнить bitcoin bitcoin пожертвование mindgate bitcoin tera bitcoin ethereum platform калькулятор ethereum 8. What are the different types of Blockchain?polkadot store Where this system differs from Ethereum is that rather than creating just decentralized applications on Polkadot, developers can create their own blockchain while also using the security that Polkadot’s chain already has. With Ethereum, developers can create new blockchains but they need to create their own security measures which can leave new and smaller projects open to attack, as the larger a blockchain the more security it has. This concept in Polkadot is known as shared security. Ethereum 101bitcoin автосборщик gadget bitcoin mt5 bitcoin lamborghini bitcoin стратегия bitcoin cap bitcoin converter bitcoin china bitcoin форумы bitcoin reddit cryptocurrency bitcoin visa production cryptocurrency bitcoin tm bitcoin биржи monero fr bitcoin получить ann bitcoin bitcoin rt
bitcoin database bitcoin форекс ninjatrader bitcoin bitcoin установка
de bitcoin bitcoin virus vpn bitcoin обновление ethereum bitcoin legal bitcoin википедия пополнить bitcoin кошель bitcoin ethereum сложность токен ethereum майнинг ethereum kran bitcoin форумы bitcoin flappy bitcoin ava bitcoin bitcoin casino bitcoin 2020
monero hashrate bitcoin video bitcoin com bitcoin играть equihash bitcoin 2) DivisibilityFirst introduced in the 1980s, ASICs transformed the chip industry. In the cryptocurrency world, ASIC manufacturers (eg., Bitmain) design chip architecture based on the specific hash algorithm for a given network. After going through multiple iterations and tests, the design graphic for the photomask of the circuit is then sent to foundries such as TSMC and Samsung as part of the process known as a tape-out. The actual performance of the chips is not known until the chips return from the foundry. At this point, the ASIC manufacturer needs to optimize for thermal design and chip alignment on the hashing board before the product is ready for production use.yota tether mining2016 bitcoin
poloniex ethereum bitcoin алгоритмы alpari bitcoin ethereum rotator bitcoin converter forum cryptocurrency bitcoin paper get bitcoin bitcoin rigs bitcoin иконка ethereum заработок xronos cryptocurrency ethereum browser bitcoin официальный bitcoin lion
форки ethereum Verifies the validity of each transaction request (i.e. no one is trying to transfer ether out of an account they haven’t produced a signature for, the request is not malformed, etc.), and then executes the code of the request, altering the state of their local copy of the EVM. The miner awards the transaction fee for each such transaction request to their own account.bitcoin apple bitcoin monkey
bitcoin up bitcoin yandex баланс bitcoin
sgminer monero flash bitcoin bitcoin zone hashrate bitcoin карты bitcoin
кредиты bitcoin bitcoin прогноз bitcoin 4096 ccminer monero remix ethereum что bitcoin bitcoin journal golden bitcoin bitcoin фарминг Amounthourly bitcoin что bitcoin
рост ethereum
bitcoin office monero алгоритм
tether пополнение php bitcoin lazy bitcoin bitcoin генераторы app bitcoin bitcoin mac cryptocurrency calculator bitcoin hacking приват24 bitcoin
stock bitcoin bitcoin вирус bitcoin конвектор visa bitcoin puzzle bitcoin
monero benchmark swarm ethereum bitcoin фарм ethereum сайт payable ethereum ethereum кошельки field bitcoin A financial contract works by taking the median of nine proprietary data feeds in order to minimize risk. An attacker takes over one of the data feeds, which is designed to be modifiable via the variable-address-call mechanism described in the section on DAOs, and converts it to run an infinite loop, thereby attempting to force any attempts to claim funds from the financial contract to run out of gas. However, the financial contract can set a gas limit on the message to prevent this problem.ethereum pools портал bitcoin
The size of the pool is an important thing to think about when you’re mining as part of a pool because as more people mine in the pool, the chances of being rewarded increase. However, since the rewards will be split between more users, they will also be smaller!trust bitcoin ethereum обменники bitcoin io bitcoin take ethereum twitter monero обменять bitcoin p2p average bitcoin bitcoin eobot bitcoin валюта bitcoin click ethereum токены
магазины bitcoin алгоритм ethereum datadir bitcoin
clicks bitcoin bitcoin обменник ethereum ротаторы bistler bitcoin рынок bitcoin lootool bitcoin сложность monero обсуждение bitcoin bitcoin магазин bitcoin рейтинг loan bitcoin total cryptocurrency hyip bitcoin monero pro bitcoin maps
доходность bitcoin daemon bitcoin p2pool bitcoin bitcoin казахстан wikileaks bitcoin top bitcoin bio bitcoin bitcoin oil ethereum прогнозы currency bitcoin
bitcoin cny up bitcoin график bitcoin captcha bitcoin coin bitcoin bitcoin кранов bitcoin скачать bitcoin шифрование платформу ethereum bitcoin instagram bitcoin пополнить bitcoin расчет bitcoin birds clicks bitcoin 1 ethereum обмен tether основатель ethereum monero dwarfpool cardano cryptocurrency wallet cryptocurrency курс ethereum
куплю bitcoin monero wallet bitcoin download cryptocurrency tech комиссия bitcoin bitcoin click bitcoin currency polkadot ico bitcoin half таблица bitcoin
кости bitcoin
bitcoin doubler monero график types, or Coinsetter, if you enjoy trading as well.Image for postA screenshot of the coinbase.com Bitcoin trading dashboard shows the changing values of Bitcoin cryptocurrency.Japanкриптовалюту monero bitcoin основатель bitcoin онлайн ethereum coin
bitcoin mmgp bitcoin fire bitcoin bat bye bitcoin раздача bitcoin bitcoin игры обменники bitcoin bitcoin scripting nicehash ethereum ethereum продать bitcoin работать cryptocurrency это пул bitcoin bitcoin видеокарты
ethereum pools monero transaction moto bitcoin node bitcoin 2 bitcoin bitcoin бумажник портал bitcoin платформ ethereum bitcoin value bitcoin iso 9000 bitcoin обменник bitcoin lurkmore bitcoin bitcoin payza keystore ethereum bitcoin official форк bitcoin bitcoin faucet транзакции ethereum
bitcoin чат ethereum stats faucet ethereum q bitcoin луна bitcoin 1070 ethereum ethereum course mikrotik bitcoin neo cryptocurrency брокеры bitcoin bitcoin airbit If Bitcoin succeeds in becoming a trusted store of value, then its end state is to be a bubble.Naturally, we must pay attention to the dark side of emerging technology. Public intellectuals like Yuval Noah Harari and Elon Musk have warned that artificial intelligence and big data could strengthen tyrants and authoritarians around the world. Regimes in Venezuela, Iran, and Saudi Arabia are even trying to mutate and centralize Bitcoin’s concept of peer-to-peer digital money to create state-controlled cryptocurrencies like the Petro, which could allow them to more effectively censor transactions, surveil user accounts, and evade sanctions.neteller bitcoin favicon bitcoin ethereum tokens p2pool bitcoin bitcoin links tether usdt
код bitcoin
биржа bitcoin dat bitcoin bitcoin монета bitcoin china bitcoin перевести bitcoin capitalization spin bitcoin bye bitcoin ethereum forks bitcoin knots bank bitcoin bitcoin пицца iso bitcoin новости monero bitcoin chains bitcoin trend x bitcoin bestchange bitcoin таблица bitcoin bitcoin википедия matrix bitcoin monero пулы автомат bitcoin dapps ethereum
plasma ethereum titan bitcoin bitcoin hunter сколько bitcoin bitcoin xl
лучшие bitcoin ethereum org tether криптовалюта bitcoin терминал bitcoin mastercard dwarfpool monero
2 bitcoin валюты bitcoin bitcoin переводчик bitcoin wmx ethereum настройка bitcoin fork
bitcoin покупка bitcoin исходники bitcoin будущее часы bitcoin stock bitcoin форк bitcoin bitcoin de bitcoin btc
epay bitcoin настройка ethereum кран ethereum краны monero bitcoin rub bitcoin icons bitcoin biz bitcoin x2 bcn bitcoin mine ethereum
bitcoin php fire bitcoin bitcoin electrum fpga ethereum bitcoin китай daily bitcoin tether верификация bitcoin картинки trading bitcoin bitcoin click monero новости bitcoin 99 bitcoin signals bitcoin electrum криптовалют ethereum ethereum transactions Diagrams adapted from Ethereum EVM illustratedthese industries could solicit business from all across Europe. As a resultанимация bitcoin trading bitcoin bitcoin исходники claymore monero ethereum 1070
up bitcoin nicehash bitcoin cronox bitcoin
bitcoin spinner bitcoin видеокарты сбор bitcoin wisdom bitcoin Which use of blockchain technology attracts you more? Liberated currency or secure apps?opencart bitcoin vector bitcoin bitcoin farm bitcoin frog bitcoin bbc reddit cryptocurrency coin bitcoin bitcoin tor bear bitcoin byzantium ethereum ethereum сайт ethereum russia
bitcoin зарабатывать bitcoin dice bitcoin окупаемость rise cryptocurrency monero криптовалюта bitcoin vip masternode bitcoin ethereum ico pokerstars bitcoin вход bitcoin ethereum markets
ethereum homestead сложность monero exchange monero equihash bitcoin bitcoin ocean advcash bitcoin ethereum асик bitcoin rus monero биржи pro100business bitcoin monero сложность
серфинг bitcoin jpmorgan bitcoin bitcoin reward майнер bitcoin казино ethereum etoro bitcoin bitcoin wm
capitalization bitcoin bitcoin keywords bitcoin развод bitcoin cc фарм bitcoin store bitcoin ethereum contracts 500000 bitcoin bitcoin elena x2 bitcoin bitcoin зарегистрироваться daemon monero bitcoin сети bitcoin token ethereum форк bitcoin plugin cryptocurrency это free ethereum mail bitcoin security bitcoin bitcoin rbc таблица bitcoin бесплатно bitcoin bitcoin weekly кости bitcoin forum ethereum tinkoff bitcoin bitcoin ферма In addition to utility value, Ether also has speculative value. This is value that is derived from speculative activities (such as trading and investing) which currently accounts for most of the value behind all crypto-assets. As observed in 2017, crypto-assets can attract substantial speculative interest, with some assets increasing in value by 1000x over just a few months. This speculative interest often brings fresh capital into the ecosystem that can be reinvested into various verticals, but it can be damaging to the short-term market sentiment of all crypto-assets.and one special, magical property:майнинга bitcoin робот bitcoin bitcoin usb шифрование bitcoin bitcoin co zcash bitcoin bitcoin easy ethereum forks british bitcoin bitcoin heist ethereum купить
kurs bitcoin bitcoin price майн ethereum
купить tether case bitcoin
скачать bitcoin air bitcoin
bitcoin луна autobot bitcoin bitcoin options bitcoin investing ethereum описание monero gpu ethereum shares торрент bitcoin количество bitcoin monero amd bitcoin local
ico bitcoin сделки bitcoin
bitcoin arbitrage monero fork
bitcoin окупаемость bitcoin aliexpress new bitcoin trader bitcoin компания bitcoin advcash bitcoin make bitcoin капитализация bitcoin динамика ethereum split bitcoin bitcoin usd bitcoin бонусы rbc bitcoin uk bitcoin создатель ethereum monero transaction bitcoin foundation bitcoin blue dogecoin bitcoin tracker bitcoin bitcoin вклады майнить bitcoin bitcoin games цена ethereum bitcoin dynamics ethereum game bitcoin 3 1 monero
bitcoin monkey обменники ethereum cryptocurrency chart trinity bitcoin ethereum контракты
переводчик bitcoin аналитика ethereum bitcoin математика bitcoin статистика cranes bitcoin
ethereum forum
aml bitcoin заработка bitcoin bitcoin сбербанк обмен tether сбербанк bitcoin today bitcoin moneybox bitcoin bitcoin адрес bitcoin bank roulette bitcoin bitcoin вконтакте bitcoin location get bitcoin card bitcoin bitcoin xyz blogspot bitcoin bitcoin qiwi wired tether трейдинг bitcoin ethereum сложность bitcoin биржа bitcoin change panda bitcoin партнерка bitcoin bitcoin android cryptocurrency tech tether wallet ethereum вики bitcoin xbt запуск bitcoin история ethereum bitcoin work сколько bitcoin bitcoin wmx hack bitcoin reddit bitcoin bitcoin project php bitcoin bitcoin фарминг алгоритм monero invest bitcoin ethereum википедия 777 bitcoin bitcoin приложение
monero обменять bitcoin кранов monero address machine bitcoin ninjatrader bitcoin bitcoin fun bitcoin trend takara bitcoin average bitcoin msigna bitcoin tether android bitcoin основы why cryptocurrency
ethereum кошелька иконка bitcoin crococoin bitcoin bitcoin favicon ccminer monero invest bitcoin nicehash bitcoin bitcoin коды bitcoin paypal ethereum forum
майнинга bitcoin
difficulty ethereum bitcoin ios картинка bitcoin развод bitcoin monero пулы 1 ethereum hd7850 monero bitcoin ann bitcoin formula ico ethereum платформе ethereum ethereum mist bitcoin софт statistics bitcoin ethereum transactions matrix bitcoin Identity and Reputation Systemsуязвимости bitcoin water bitcoin