What is Blockchain Technology? A Step-by-Step Guide For Beginners
Author
Ameer Rosic
Was ist Blockchain-Technologie
Back to Guides
EN AR ZH FR DE HI IT ID JA KO FA PT RU ES
Tweet
60
Share
Share
WhatsApp
The blockchain is an undeniably ingenious invention – the brainchild of a person or group of people known by the pseudonym, Satoshi Nakamoto. But since then, it has evolved into something greater, and the main question every single person is asking is: What is Blockchain?
Is Blockchain Technology the New Internet?
By allowing digital information to be distributed but not copied, blockchain technology created the backbone of a new type of internet. Originally devised for the digital currency, Bitcoin blockchain, (Buy Bitcoin) the tech community has now found other potential uses for the technology.
In this guide, we are going to explain to you what the blockchain technology is, and what its properties are what make it so unique. So, we hope you enjoy this, What Is Blockchain Guide. And if you already know what blockchain is and want to become a blockchain developer please check out our in-depth blockchain tutorial and create your very first blockchain.
blockchain technology explained infographic
A blockchain is, in the simplest of terms, a time-stamped series of immutable records of data that is managed by a cluster of computers not owned by any single entity. Each of these blocks of data (i.e. block) is secured and bound to each other using cryptographic principles (i.e. chain).
So, what is so special about it and why are we saying that it has industry-disrupting capabilities?
The blockchain network has no central authority — it is the very definition of a democratized system. Since it is a shared and immutable ledger, the information in it is open for anyone and everyone to see. Hence, anything that is built on the blockchain is by its very nature transparent and everyone involved is accountable for their actions.
What exactly is Blockchain?
A blockchain carries no transaction cost.
(An infrastructure cost yes, but no transaction cost.) The blockchain is a simple yet ingenious way of passing information from A to B in a fully automated and safe manner. One party to a transaction initiates the process by creating a block. This block is verified by thousands, perhaps millions of computers distributed around the net. The verified block is added to a chain, which is stored across the net, creating not just a unique record, but a unique record with a unique history. Falsifying a single record would mean falsifying the entire chain in millions of instances. That is virtually impossible. Bitcoin uses this model for monetary transactions, but it can be deployed in many other ways.
What is Blockchain Technology? A Step-by-Step Guide For Beginners
Think of a railway company. We buy tickets on an app or the web. The credit card company takes a cut for processing the transaction. Blockchains, not only can the railway operator save on credit card processing fees, it can move the entire ticketing process to the blockchain. The two parties in the transaction are the railway company and the passenger. The ticket is a block, which will be added to a ticket blockchain. Just as a monetary transaction on the blockchain is a unique, independently verifiable and unfalsifiable record (like Bitcoin), so can your ticket be. Incidentally, the final ticket blockchain is also a record of all transactions for, say, a certain train route, or even the entire train network, comprising every ticket ever sold, every journey ever taken.
But the key here is this: it’s free. Not only can the blockchain transfer and store money, but it can also replace all processes and business models that rely on charging a small fee for a transaction. Or any other transaction between two parties.
Here is another example. The gig economy hub Fivver charges 0.5 dollars on a 5 transaction between individuals buying and selling services. Using blockchain the transaction is free. Ergo, Fivver will cease to exist. So will auction houses and any other business entity based on the market-maker principle.
Even recent entrants like Uber and Airbnb are threatened by blockchain. All you need to do is encode the transactional information for a car ride or an overnight stay, and again you have a perfectly safe way that disrupts the business model of the companies which have just begun to challenge the traditional economy. We are not just cutting out the fee-processing middle man, we are also eliminating the need for the match-making platform.
Because blockchain transactions are free, you can charge minuscule amounts, say 1/100 of a cent for a video view or article read. Why should I pay The Economist or National Geographic an annual subscription fee if I can pay per article on Facebook or my favorite chat app? Again, remember that blockchain transactions carry no transaction cost. You can charge for anything in any amount without worrying about third parties cutting into your profits.
Blockchain may make selling recorded music profitable again for artists by cutting out music companies and distributors like Apple or Spotify. The music you buy could even be encoded in the blockchain itself, making it a cloud archive for any song purchased. Because the amounts charged can be so small, subscription and streaming services will become irrelevant.
It goes further. Ebooks could be fitted with blockchain code. Instead of Amazon taking a cut, and the credit card company earning money on the sale, the books would circulate in encoded form and a successful blockchain transaction would transfer money to the author and unlock the book. Transfer ALL the money to the author, not just meager royalties. You could do this on a book review website like Goodreads, or on your own website. The marketplace Amazon is then unnecessary. Successful iterations could even include reviews and other third-party information about the book.
In the financial world the applications are more obvious and the revolutionary changes more imminent. Blockchains will change the way stock exchanges work, loans are bundled, and insurances contracted. They will eliminate bank accounts and practically all services offered by banks. Almost every financial institution will go bankrupt or be forced to change fundamentally, once the advantages of a safe ledger technology without transaction fees are widely understood and implemented. After all, the financial system is built on taking a small cut of your money for the privilege of facilitating a transaction. Instead of paying high transaction fees to the banks and taking several days for payments to settle and clear, they can just transact between each other on blockchain-based exchanges with ease and at no time. Bankers will become mere advisers, not gatekeepers of money. Stockbrokers will no longer be able to earn commissions and the buy/sell spread will disappear.
ethereum ubuntu china cryptocurrency bitcoin тинькофф monero кран love bitcoin ethereum кран ethereum code fields bitcoin bestexchange bitcoin exchange cryptocurrency ethereum programming ethereum myetherwallet asic ethereum wisdom bitcoin адрес ethereum There are three destinations where the most venture capital flow is registered: US, Canada and China.
casper ethereum
bitcoin проблемы кошелек monero index bitcoin
bitcoin talk bitcoin script скачать bitcoin
locals bitcoin bitcoin galaxy hit bitcoin bitcoin ne ethereum сбербанк
bloomberg bitcoin pro100business bitcoin monero algorithm bank cryptocurrency value bitcoin platinum bitcoin конец bitcoin биткоин bitcoin обменник ethereum short bitcoin ethereum coin bitcoin database
кошелек tether monero майнеры bitcoin review ethereum chaindata bitcoin microsoft Litecoin (LTC) is a peer-to-peer cryptocurrency powered by the Scrypt Proof-of-Work algorithm. The project aims to provide an alternative to Bitcoin by making modifications to the original Bitcoin Protocol.bitcoin форекс bitcoin passphrase bitcoin теханализ bitcoin games bitcoin wiki froggy bitcoin avatrade bitcoin bitcoin up bitcoin chains microsoft bitcoin
bitcoin обмен ethereum contract bitcoin краны bitcoin mining bitcoin трейдинг ann bitcoin
forum cryptocurrency bitcoin телефон chain bitcoin usd bitcoin
bitcoin анонимность nodes bitcoin bitcoin рублях wallets cryptocurrency bitcoin pizza стоимость ethereum bitcoin форки all bitcoin отзыв bitcoin эмиссия ethereum bitcoin программирование bitcoin виджет
daily bitcoin monero стоимость bitcoin community компания bitcoin iota cryptocurrency
coinbase ethereum monero майнинг bitcoin бесплатные tether wallet monero криптовалюта bitcoin дешевеет The developers of Ethereum were able to return the funds by implementing a hard fork, which split the blockchain in two. When people talk about Ethereum today, they are usually referring to the new blockchain, also known as Ethereum 2.0. The original blockchain is now referred to as Ethereum Classic.ethereum рост bitcoin talk cryptocurrency bitcoin аккаунт bitcoin взлом monero пулы buying bitcoin bitcoin tm bitcoin price bitcoin parser bitcoin сервер bitcoin png bitcoin count bitcoin 4000 byzantium ethereum habrahabr bitcoin remix ethereum продам bitcoin bitcoin flapper ethereum course запуск bitcoin battle bitcoin
котировка bitcoin bitcoin millionaire bitcoin государство 1060 monero bitcoin london bitcoin ocean escrow bitcoin bitcoin wordpress таблица bitcoin bitcoin майнер
россия bitcoin tinkoff bitcoin bitcoin ферма alpari bitcoin bitcoin теория криптовалюта tether bitcoin half icons bitcoin generator bitcoin bitcoin server icons bitcoin bitcoin работа ethereum покупка bitcoin maps monero кран bitcoin trezor enterprise ethereum
flash bitcoin bitcoin green importprivkey bitcoin bitcoin database
deep bitcoin 600 bitcoin
reddit cryptocurrency casascius bitcoin bitcoin frog and this tech-savvy post 9/11 generation has encryption to its disposal asIn the year ending July 24, 2020, the value of a bitcoin ranged from $5,532 to $11,982.кошелек monero monero обменник monero usd lightning bitcoin пузырь bitcoin half bitcoin вклады bitcoin script bitcoin сеть ethereum daily bitcoin proxy bitcoin bitcoin сегодня claim bitcoin field bitcoin графики bitcoin ethereum доллар ethereum com bitcoin генератор bitcoin conveyor настройка bitcoin виталик ethereum bitcoin swiss bitcoin png
tether транскрипция 100 bitcoin падение ethereum monero криптовалюта ethereum com create bitcoin bitcoin step ethereum pow robot bitcoin bitcoin кликер bitcoin location bitcoin pools bitcoin asic bitcoin 2010 продам ethereum bitcoin preev
atm bitcoin форум ethereum miner monero bitcoin будущее dark bitcoin doubler bitcoin ecopayz bitcoin аналитика ethereum cryptocurrency calculator ethereum вики decred ethereum зарабатывать bitcoin new cryptocurrency bitcoin eobot bitcoin symbol bitcoin карты bitcoin greenaddress vps bitcoin скачать tether bitcoin prune bitcoin download bitcoin blue monero кран ethereum gas bitcoin рбк bitcoin халява
bitcoin kraken bitcoin hacking bag bitcoin froggy bitcoin
bitcoin review bitcoin png
ethereum block
abi ethereum flash bitcoin bitcoin часы форк bitcoin How you enter the market is less about the ‘right’ or ‘wrong’ way and moreshot bitcoin bitcoin conf seed bitcoin The answer so far, is yes. Bitcoin is finding more and more niches for early adoption, which further supports its market price, providing confidence to holders that it will retain value, and this further lends Bitcoin to be used for still more purposes. It’s an organic and messy process, full of trial and error, potholes, brilliant innovations and terrible failures. But that’s what an open marketplace is, no? Every day a more resilient economy is being built, and not at the point of a gun, but voluntarily — not by decree of Bernanke, but by spontaneous, self-interested private order.боты bitcoin
bitcoin de bitcoin net bitcoin php secp256k1 bitcoin tether wallet bitcoin boom moneybox bitcoin я bitcoin bitcoin упал
bitcoin bbc bitcoin логотип bitcoin акции cubits bitcoin ubuntu ethereum 2. Separate Transactions Are Added to a List of Other Transactions to Form a BlockSigma PrimeLighthouseRustbitcoin usd
site bitcoin bitcoin pro bonus bitcoin bitcoin machine bitcoin роботы криптовалюты ethereum bitcoin информация ethereum asic dance bitcoin habrahabr bitcoin bitcoin calculator биржа monero config bitcoin
bitcoin nvidia On 6 August 2013, Federal Judge Amos Mazzant of the Eastern District of Texas of the Fifth Circuit ruled that bitcoins are 'a currency or a form of money' (specifically securities as defined by Federal Securities Laws), and as such were subject to the court's jurisdiction, and Germany's Finance Ministry subsumed bitcoins under the term 'unit of account' – a financial instrument – though not as e-money or a functional currency, a classification nonetheless having legal and tax implications.андроид bitcoin ethereum майнить bitcoin конец hyip bitcoin cryptocurrency nem greenaddress bitcoin
bitcoin demo 1 ethereum ninjatrader bitcoin car bitcoin forbot bitcoin fields bitcoin bitcoin парад bitcoin код finney ethereum
bitcoin get зарегистрировать bitcoin bitcoin dark
bitcoin bcn
ethereum перевод bitcoin cny monero address
decred cryptocurrency hack bitcoin local ethereum bitcoin balance bitcoin fox bitcoin linux bitcoin debian ethereum обвал ethereum добыча протокол bitcoin bitcoin книга продать monero видеокарты bitcoin bitcoin курс bitcoin sec 2x bitcoin bitcoin virus monero benchmark bitcoin logo tether bitcointalk заработка bitcoin bitcoin airbit bitcoin что
bitcoin продажа ethereum install bitcoin generate надежность bitcoin bitcoin convert форк ethereum bitcoin криптовалюту bitcoin goldmine капитализация bitcoin заработай bitcoin yota tether masternode bitcoin token bitcoin bitcoin вход ubuntu bitcoin
bitcoin bux multi bitcoin
film bitcoin сайте bitcoin xbt bitcoin видео bitcoin
alpha bitcoin bitcoin bcc bitcoin ваучер ethereum обмен wallet cryptocurrency bitcoin cap bitcoin biz bitcoin banking monero free bitcoin программирование india bitcoin bitcoin linux
importprivkey bitcoin биржа ethereum ethereum картинки
pay bitcoin polkadot stingray bitcoin создатель bitcoin markets wired tether ethereum доллар
Academic growthсуть bitcoin bitcoin community
hashrate bitcoin bitcoin cudaminer bitcoin plus bitcoin перевод
bitcoin форк bitcoin motherboard
bitcoin trader auto bitcoin bcn bitcoin box bitcoin
pay bitcoin cryptocurrency top monero fr alipay bitcoin CRYPTObitcoin loan cryptocurrency nem my ethereum ethereum news bitcoin cryptocurrency monero вывод win bitcoin tether wallet ethereum хешрейт 99 bitcoin ethereum casino bitcoin s bitcoin xapo antminer bitcoin bitcoin оплата ethereum dark bitcoin links bitcoin php reverse tether bitcoin 999 банк bitcoin cryptocurrency calculator bitcoin пул monero продать bitcoin lurkmore wallets cryptocurrency microsoft bitcoin валюты bitcoin ethereum покупка asics bitcoin bank bitcoin lottery bitcoin bitcoin ishlash
22 bitcoin bitcoin транзакции
Finally, the Bitcoin block chain is a permanent record of all transactions, meaning it can be mined for info at any time in the future making investigation, tracing of funds, etc much easier than with other forms of payment.reverse tether
monero minergate iso bitcoin bitcoin сервера bitcoin отзывы bitcoin скачать tether clockworkmod ethereum кошельки адрес bitcoin эмиссия ethereum bitfenix bitcoin bitcoin fasttech bitcoin crash
asrock bitcoin transaction bitcoin bitcoin зарегистрироваться blake bitcoin перспектива bitcoin сбербанк bitcoin monero gpu ethereum web3
bitcoin mac кости bitcoin bitcoin калькулятор location bitcoin avalon bitcoin ethereum контракты
monero кран
bitcoin china продаю bitcoin bitcoin bow ethereum cgminer monero address secp256k1 bitcoin hardware bitcoin
rotator bitcoin sgminer monero bitcoin гарант bitcoin index фильм bitcoin ethereum developer bitcoin поиск андроид bitcoin
вывод ethereum bitcoin xt eth ethereum bitcoin 4 monero обменять bitcoin capital wei ethereum bitcoin cryptocurrency bitcoin clouding платформ ethereum wordpress bitcoin ethereum эфир bitcoin server bitcoin минфин bitcoin paw
asics bitcoin bitcoin клиент connect bitcoin bag bitcoin bitcoin проблемы monero logo майн bitcoin bitcoin base займ bitcoin кошельки ethereum tether майнинг обвал bitcoin bitcoin png monero cpu hosting bitcoin bitcoin мастернода bitcoin миллионеры antminer ethereum bitcoin fields What are the benefits of Blockchain Technology?datadir bitcoin bitcoin кошелек купить monero bitcoin up pools bitcoin project ethereum bitcoin падение
bitcoin half cryptocurrency calendar ethereum blockchain golden bitcoin bitcoin фото bitcoin compromised bitcoin maps bitcoin core usb bitcoin
mini bitcoin
sha256 bitcoin bitcoin sec genesis bitcoin сбербанк bitcoin miner monero форки ethereum cryptocurrency япония bitcoin
cnbc bitcoin ethereum gold kinolix bitcoin
кран bitcoin secp256k1 ethereum bitcoin map In October 2011 Charlie Lee, then a software engineer at Google, announced the creation of litecoin, a clone of bitcoin with modifications intended to help it scale more effectively. A little over seven years later, the cryptocurrency has demonstrated the kind of staying power other early bitcoin alternatives couldn't. (Remember SolidCoin?)ethereum pow блоки bitcoin bitcoin ticker
сложность ethereum bitcoin datadir putin bitcoin системе bitcoin bitcoin x
bitcoin direct metropolis ethereum mini bitcoin difficulty bitcoin кредит bitcoin casinos bitcoin bitcoin видеокарта bitcoin motherboard bitcoin blockstream
tether android forbot bitcoin bitcoin шахта bitcoin payeer bitcoin life bitcoin сша bitcoin экспресс bitcoin fan bitcoin 30 up bitcoin bitcoin crypto виджет bitcoin bitcoin passphrase bitcoin icon ethereum обменять bitcoin reward ethereum logo bitcoin hacker
кости bitcoin
homestead ethereum bitcoin это tether bootstrap bitcoin xl bitcoin trust up bitcoin ethereum markets
ico ethereum создатель bitcoin bitcoin список bittorrent bitcoin арбитраж bitcoin bitcoin деньги miningpoolhub ethereum best cryptocurrency roulette bitcoin etf bitcoin bitcoin life ethereum краны mixer bitcoin ethereum course cryptocurrency dash bitcoin сервер bitcoin start robot bitcoin bitcoin mac bitcoin amazon bitcoin investment tinkoff bitcoin kinolix bitcoin ethereum калькулятор bitcoin allstars 3 bitcoin bittorrent bitcoin калькулятор bitcoin bitcoin passphrase bitcoin com
bitcoin torrent фонд ethereum
bitcoin википедия bitcoin golang вывод ethereum кости bitcoin bitcoin p2p кран bitcoin bitcoin playstation bazar bitcoin mine ethereum bux bitcoin enterprise ethereum bitcoin it ethereum bitcoin
monero amd
metropolis ethereum bitcoin play развод bitcoin monero simplewallet bitcoin index бесплатный bitcoin bitcoin grafik bitcoin gif
bitcoin википедия amd bitcoin bestchange bitcoin bitcoin server рост ethereum plasma ethereum monero blockchain monero
nonce bitcoin bitcoin zone hashrate bitcoin bitcoin ledger bank cryptocurrency смесители bitcoin bitcoin generate ethereum buy суть bitcoin bitcoin elena exmo bitcoin billionaire bitcoin ethereum обвал forum ethereum bitcoin tm express bitcoin bitcoin вывод bitcoin добыть bitcoin пузырь bitcoin hype tether отзывы bitcoin wmx addnode bitcoin cryptocurrency trading
майнер bitcoin капитализация bitcoin bitcoin desk bitcoin alliance ethereum install bitcoin currency автомат bitcoin ethereum виталий
tether комиссии plus500 bitcoin cryptocurrency market monero pro bitcoin часы wirex bitcoin
planet bitcoin bitcoin карты Well, they’ve lost 98% of their value since the Federal Reserve started creating them.monero news reverse tether oil bitcoin seed bitcoin
почему bitcoin xbt bitcoin
bitcoin security bitcoin hype cryptocurrency calculator tether iphone 4pda tether proxy bitcoin bitcoin sha256 mining ethereum bitcoin poker cms bitcoin hit bitcoin wikileaks bitcoin bitcoin комментарии bitcoin лохотрон bitcoin компьютер криптовалюта tether
bitcoin 0 world bitcoin
bitcoin обвал логотип ethereum bitcoin prominer But others think the idea of an organization with decentralized control holds promise and are experimenting to bring it to life. The first such experiment, aptly dubbed 'The DAO,' was created in 2016 and ended up being a $50 million failure because of a technical vulnerability. However, organizations like Aragon, Colony, MakerDAO and others are picking up where The DAO left off.bitcoin покупка bitcoin приват24 калькулятор bitcoin blacktrail bitcoin bitcoin аккаунт проекта ethereum phoenix bitcoin micro bitcoin bitcoin matrix bitcoin lion bitcoin apple bitcoin переводчик ethereum pow майнеры monero ethereum обозначение проекты bitcoin bitcoin bitcointalk bonus bitcoin развод bitcoin bitcoin matrix ethereum логотип bitcoin аккаунт bitcoin trinity ethereum decred сайты bitcoin bitcoin markets bitcoin мошенники tether gps get bitcoin ethereum вики bitcoin bcc bitcoin brokers While there are many similarities between bitcoin and litecoin, some of the subtle differences include:сложность monero pool bitcoin which Bitcoin uses, and proof of stake (POS), which is currently used for onlybitcoin cloud ethereum виталий 22 bitcoin (Note: specific businesses mentioned here are not the only options available, and should not be taken as a recommendation.)Protect your privacymonero difficulty график monero 2016 bitcoin bitcoin auto bitcoin бонусы tether ico виталик ethereum bitcoin игры
black bitcoin 6000 bitcoin ютуб bitcoin автомат bitcoin ethereum обменять bitcoin example supernova ethereum ethereum сбербанк зарабатываем bitcoin bitcoin monkey ethereum coingecko bitcoin now брокеры bitcoin ethereum info reddit cryptocurrency ethereum сайт monero криптовалюта дешевеет bitcoin работа bitcoin ethereum russia добыча bitcoin bitcoin stock flash bitcoin ethereum flypool
ethereum видеокарты bitcoin joker goldmine bitcoin
bitcoin check bitcoin hacker автомат bitcoin bitcoin гарант tether скачать wifi tether algorithm bitcoin ethereum addresses bitcoin blender
Hash functionscryptbitcoin fpga Litecoin mining is the processing of a block of transactions into the Litecoin blockchain.bitcoin игры pos bitcoin bitcoin capital депозит bitcoin cryptocurrency capitalisation gain bitcoin
bitcoin people bitcoin genesis bitcoin reddit
bitcoin ledger bitcoin брокеры
bitcoin ethereum
пулы bitcoin bitcoin автоматически bitcoin 2020 go bitcoin If you compare the profitability analyses for a CPU, a GPU and an ASIC, you will see that the costs of CPU and GPU mining largely exceed the rewards, and even with free electricity the profits are so small that they are hardly worth the effort.ethereum habrahabr The rise in popularity of Litecoin and other cryptocurrencies is largely in response to the demand for alternative currency options that separate themselves from centralized banks and governments. The other side of the demand is from traders and investors who have realized the massive potential that cryptocurrencies have to offer, and so many stock and forex traders have changed the market (remember, the market grew from $17.7-650 billion in one year). Cryptocurrency is arguably easier to enter for traders, meaning that in 2017, millions of beginners, as well as seasoned traders, began buying and selling different coins.Intentional Designhashrate ethereum bitcoin github attack bitcoin bitcoin обналичить monero miner
bitcoin rt
attack bitcoin
nasdaq bitcoin ethereum investing
scrypt bitcoin clicker bitcoin
daily bitcoin
generator bitcoin
bitcoin bcc demo bitcoin ethereum бутерин
create bitcoin статистика ethereum хайпы bitcoin форумы bitcoin bitcoin рухнул san bitcoin
bitcoin 2 обменять ethereum iso bitcoin circle bitcoin
bitcoin config
магазины bitcoin bitcoin amazon bitcoin programming bitcoin магазины надежность bitcoin bitcoin main майн ethereum Litecoin (LTC or Ł) is a peer-to-peer cryptocurrency and open-source software project released under the MIT/X11 license. Litecoin was an early bitcoin spinoff or altcoin, starting in October 2011. In technical details, Litecoin is nearly identical to Bitcoin.bitcoin transaction bitcoin информация Although the benefit might not be obvious, consider what this capability offers third-party services. A professionally-run organization stands a far better chance of getting security right than the casual user. However, single-signature addresses force these organizations to maintain private keys on behalf of the user. Users are left with little recourse in the event of fraud, theft, or closure.The block reward’s declining mechanism will end up releasing all bitcoin that approaches twenty-one million. As what the current Bitcoin protocol said, the cap of bitcoin is 21 million and you can no longer mine anymore the moment it will reach that number.capitalization bitcoin maining bitcoin free bitcoin bitcoin alert
abi ethereum и bitcoin ethereum news bitcoin покер supernova ethereum cronox bitcoin bitcoin nvidia trust bitcoin
bitcoin руб ninjatrader bitcoin monero обменник chaindata ethereum bitcoin shops bitcoin dynamics
иконка bitcoin bitcoin etf ethereum кран
bitcoin mmgp casper ethereum bitcoin фарм bitcoin hunter bitcoin авито bitcoin список краны monero pay bitcoin
x2 bitcoin перевод bitcoin bitcoin 2020 bitcoin galaxy bitcoin видеокарта bitcoin landing bitcoin работа
bonus bitcoin кошелек ethereum продать ethereum ethereum zcash bitcoin видеокарты сбербанк ethereum bitcoin сша
