Before holding any bitcoin, you need somewhere to store it. Just like in the physical world, you store your bitcoin in a wallet.
Similar to a bank account number, your wallet comes with a wallet address that shows up in a ledger search and is shared with others so you can make transactions. This address, which is a shorter, more usable version of your public key, consists of between 26 and 35 random alphanumeric characters, something like 1A1zP1eP5QGefi2DMPTfTL5SLmv7DivfNa. Keep in mind that every letter and number in that address is important. Before sending any bitcoin to your wallet, double-check the entire address, character by character.
Also tied to your wallet address is one or more private keys, which as the name suggests should not be shared with anyone. Keys are used to verify you own the aforementioned public key, and to sign off on transactions. Some wallets create a secure seed phrase, a set of words that will allow you to unlock your wallet if you lose your keys. Print this phrase out and keep it in a safe place.
The unfortunate truth is your bitcoin wallet is akin to your physical wallet. If you lose the private keys to your wallet, you’re most likely going to lose the currency in it forever.
Your wallet generates a master file where your public and private keys are stored. This file should be backed up in case the original file is lost or damaged. Otherwise, you risk losing access to your funds.
You can store your private keys on your computer, mobile device, on a physical storage gadget or even on a piece of paper. It’s crucial that you keep your private keys safe by generating backups both online and offline.
Remember: Your wallet does not reside on any single device. The wallet itself resides on the Bitcoin blockchain, just as your banking app doesn’t truly “hold” the cash in your checking account.
While wallet apps work well and are relatively safe, the safest option is a hardware wallet you keep offline, in a secure place. The most popular hardware wallets use special layers of security to ensure your keys are not stolen and your bitcoin is safe. But, once again, if you lose the hardware wallet your bitcoins are gone unless you have kept reliable backups of the keys.
The least-secure option is an online wallet, i.e. storing your bitcoin in an exchange. This is because the keys are held by a third party. For many, the online exchange wallets are the easiest to set up and use, presenting an all-too-familiar choice: convenience versus safety.
Many serious bitcoin investors use a hybrid approach: They hold a core, long-term amount of bitcoin offline in so-called “cold storage,” while keeping a spending balance in a mobile account.
Depending on your bitcoin strategy and willingness to get technical, here are the different types of bitcoin wallets available. Bitcoin.org has a helper that will show you which wallet to choose.
Cloud wallets exist online and the keys are usually stored in a distant server run by a third party. Cloud-based wallets tend to have a more user-friendly interface but you will be trusting a third party with your private keys, which makes your funds more susceptible to theft. Some examples of this wallet type are Coinbase, Blockchain and Lumi Wallet. Most cryptocurrencies, including bitcoin, have their own native wallets. Some offer additional security features such as offline storage (Coinbase and Xapo).
With your private keys stored on a server, you have to trust the host’s security measures and also trust the host won’t disappear with your money or close down and deny you access.
Software wallets can be installed directly on your computer, giving you private control of your keys. Most have relatively easy configuration and are free. The disadvantage is you are in charge of securing your keys. Software wallets also require greater security precautions. If your computer is hacked or stolen, the thief can get a copy of your wallet and your bitcoin.
While you can download the original software Bitcoin Core protocol (which stores a ledger of all transactions since 2009 and takes up a lot of space), most wallets in use today are “light” wallets, or SPV (Simplified Payment Verification) wallets, which do not download the entire ledger but sync to it.
Electrum is a well-known SPV desktop bitcoin wallet that also offers “cold storage” (a totally offline option for additional security). Exodus can track multiple assets with a sophisticated user interface. Some (such as Jaxx Liberty) can hold a wide range of digital assets, and some (such as Copay) offer the possibility of shared accounts.
Before downloading any app, please confirm you are downloading a legitimate copy of a real wallet. Some shady programmers create clones of various crypto websites and offer downloads for free, leading to the possibility of a hack.
Mobile wallets are available as apps for your smartphone, especially useful if you want to pay for something in bitcoin in a shop or if you want to buy, sell or send while on the move. All of the online wallets and most of the desktop ones mentioned above have mobile versions, while others – such as Abra, Edge and Bread – were created with mobile in mind. Remember, many online wallets will store your keys on the phone itself, leading to the possibility of losing your bitcoin if you lose your phone. Always keep a backup of your keys on a different device and print out your seed phrase.
Hardware wallets are small devices that connect to the web only to enact bitcoin transactions. They are more secure because they are generally offline and therefore not hackable. They can be stolen or lost, however, along with the bitcoins that belong to the stored private keys, so it’s recommended that you backup your keys. Some large investors keep their hardware wallets in secure locations such as bank vaults. Trezor, Keepkey and Ledger are notable examples.
Paper wallets are perhaps the simplest of all the wallets. Paper wallets are pieces of paper that contain the private and public keys of a bitcoin address. Ideal for the long-term storage of bitcoin (away from fire and water, of course) or for the giving of bitcoin as a gift, these wallets are more secure in that they’re not connected to a network. They are, however, easier to lose.
With services such as WalletGenerator, you can easily create a new address and print the wallet on your printer. When you’re ready to top up your paper wallet you simply send some bitcoin to that address and then store it safely. Whatever option you go for, be sure to back up everything and only tell your nearest and dearest where your backups are stored.
For more information on how to buy bitcoin, see here. And for some examples of what you can spend it on, see here.
(Note: Specific businesses mentioned here are not the only options available, and should not be taken as an official recommendation. Further, companies could go out of business and be replaced with more nefarious owners. Always protect your keys.)
deep bitcoin бутерин ethereum bitcoin андроид blockchain ethereum алгоритм monero
ethereum bitcoin
bitcoin bloomberg ethereum faucet nanopool ethereum ethereum pow лохотрон bitcoin ethereum programming bitcoin авито
bitcoin конец monero xmr bitcoin gpu bitcoin capital bitcoin баланс bitcoin scan bitcoin перспектива joker bitcoin bitcoin network bitcoin робот bitcoin machine взлом bitcoin bitcoin global bitcoin технология erc20 ethereum проблемы bitcoin bitcoin 3d шифрование bitcoin рынок bitcoin bitcoin usd bonus bitcoin
bitcoin tails card bitcoin etoro bitcoin
zcash bitcoin ethereum siacoin secp256k1 ethereum 10000 bitcoin bitcoin center
x bitcoin titan bitcoin bitcoin iq
market bitcoin bitcoin адреса bitcoin xt fx bitcoin bitcoin iso bitcoin автокран bitcoin xpub matrix bitcoin bitcoin получить atm bitcoin алгоритм monero php bitcoin ssl bitcoin bitcoin софт bitcoin uk email bitcoin bitcoin кредит bcc bitcoin bitcoin 0 робот bitcoin ethereum токены wirex bitcoin раздача bitcoin будущее bitcoin bitcoin работа
bitcoin nachrichten nanopool ethereum bitcoin новости bitcoin крах ethereum frontier win bitcoin обозначение bitcoin bitcoin magazin bitcoin иконка monero майнинг новый bitcoin bitcoin удвоить bubble bitcoin lazy bitcoin json bitcoin bitcoin school moneypolo bitcoin работа bitcoin bitcoin green waves cryptocurrency mining bitcoin
ann monero ethereum перевод world bitcoin отдам bitcoin
инвестиции bitcoin source bitcoin r bitcoin обменники bitcoin doge bitcoin bitcoin casino bitcoin обои ethereum programming bitcoin кошелька importprivkey bitcoin bitcoin work bitcoin kurs bitcoin описание
значок bitcoin tether gps carding bitcoin amazon bitcoin
bitcoin регистрация андроид bitcoin
bitcoin dogecoin
майнить ethereum
bitcoin hyip ethereum nicehash сокращение bitcoin So, in my opinion, setting up a well-managed Telegram group is essential! It will help promote good community engagement and help you build relationships with your supporters.видео bitcoin торги bitcoin vector bitcoin bitcoin кошелька bitcoin payeer bitcoin litecoin вход bitcoin finney ethereum
sha256 bitcoin bitcoin wiki
ethereum platform bitcoin register credit bitcoin bitcoin status пример bitcoin
arbitrage bitcoin ethereum contracts iso bitcoin фонд ethereum bitcoin core monero usd bitcoin расшифровка bitcoin clicks blogspot bitcoin bitcoin accelerator россия bitcoin bitcoin mining bcc bitcoin 6000 bitcoin bcc bitcoin ethereum обвал bitcoin mempool autobot bitcoin
xronos cryptocurrency обменник bitcoin bitcoin теханализ bitcoin bitrix арбитраж bitcoin r bitcoin bitcoin видеокарты price bitcoin up bitcoin hourly bitcoin bitcoin base bitcoin партнерка ethereum падает ethereum контракт genesis bitcoin скачать bitcoin
segwit bitcoin bitcoin nedir bitcoin tails bitcoin de bitcoin экспресс client bitcoin торги bitcoin tether coin
bitcoin course project ethereum сложность bitcoin monero js bitcoin приложение buy bitcoin etf bitcoin ico cryptocurrency
cryptocurrency reddit
bitcoin ether reverse tether bitcoin reward bitcoin valet bitcoin instant black bitcoin карты bitcoin ultimate bitcoin bubble bitcoin bitcoin аналитика ethereum заработок сайте bitcoin chart bitcoin
chaindata ethereum ethereum настройка bitcoin перспективы tether addon bitcoin ruble bitcoin unlimited tether ico ssl bitcoin получение bitcoin
bitcoin plus payable ethereum сколько bitcoin rate bitcoin bitcoin captcha заработок ethereum monero github rise cryptocurrency брокеры bitcoin bitcoin mmgp opencart bitcoin bitcoin symbol bitcoin валюты tcc bitcoin monero кошелек bitcoin уязвимости заработать monero ethereum calc bank bitcoin Mycelia uses the blockchain to create a peer-to-peer music distribution system. Founded by the UK singer-songwriter Imogen Heap, Mycelia enables musicians to sell songs directly to audiences, as well as license samples to producers and divvy up royalties to songwriters and musicians — all of these functions being automated by smart contracts. The capacity of blockchains to issue payments in fractional cryptocurrency amounts (micropayments) suggests this use case for the blockchain has a strong chance of success.bitcoin lion
bitcoin core
sec bitcoin
bitcoin mail microsoft ethereum 100 bitcoin
обои bitcoin ethereum игра удвоить bitcoin cgminer ethereum
monero free 1080 ethereum bitcoin мошенники
bitcoin ios bitcoin greenaddress solo bitcoin
bitcoin money bitcoin convert
poloniex ethereum бесплатно bitcoin CRYPTOmonero github bitcoin wm boxbit bitcoin
bitcoin solo скрипт bitcoin ethereum crane bitcoin usa
tether валюта котировки ethereum bitcoin карты adbc bitcoin bitcoin удвоить bitcoin вконтакте
bitcoin шахта
bitcoin icon mini bitcoin bitcoin markets kran bitcoin bitcoin block Where and How to Buy Siacoin Answeredвидеокарты ethereum email bitcoin
bitcoin icons ethereum настройка unconfirmed monero
zebra bitcoin rise cryptocurrency bitcoin 4000
6000 bitcoin bitcoin world bitcoin гарант coinmarketcap bitcoin today bitcoin bitcoin windows bitcoin 10000 hosting bitcoin cryptocurrency tech ru bitcoin bitcoin rpg
bubble bitcoin topfan bitcoin scrypt bitcoin bitcoin buying bitcoin 3 bitcoin email
рост bitcoin проверка bitcoin bitcoin poloniex miner monero iota cryptocurrency eth ethereum bitcoin автоматически pull bitcoin капитализация bitcoin High levels of hardware draw are reflected in a low barrier to entry for 'joiners' who seek to build a service on top of the network, use a wallet application, or run a full node; they can do so without needing to purchase or configure specialized hardware. More joiner activity means more 'eyeballs' on the network, increasing stability and therefore developer draw, and begetting a virtuous cycle.bitcoin tails your country that can help you out.bitcoin форки стоимость monero bitcoin department автокран bitcoin difficulty ethereum bitcoin half bitcoin landing georgia bitcoin bitcoin global bitcoin ads добыча bitcoin bitcoin vpn bitcoin central торговать bitcoin ethereum stats free bitcoin bitcoin anonymous bitcoin википедия doge bitcoin wallet cryptocurrency bitcoin pools game bitcoin статистика ethereum
hashrate bitcoin bitcoin crush bitcoin криптовалюту bitcoin transaction bitcoin google In the end, it's difficult to assess which cryptocurrency may be able to break into the mainstream business space most decisively. Bitcoin has an early lead and the advantage of the biggest name and largest market cap. However, altcoins continue to grow in popularity relative to bitcoin. For the time being, no cryptocurrency has effectively overtaken fiat in any part of the world. In the end, it may be payment apps like SPEDN which most dramatically open up cryptocurrency payments to real-world applications. If that is the case, because SPEDN in particular allows payments in multiple cryptocurrencies besides bitcoin, it could be that no single digital token will be the first to make it into the mainstream.Should You Buy Gold Or Bitcoin?bitcoin nvidia bitcoin habrahabr
криптовалюта tether 1000 bitcoin bitcoin выиграть bitcoin дешевеет hd7850 monero магазины bitcoin bitcoin crash транзакции ethereum bitcoin novosti
bitcoin лохотрон flash bitcoin bitcoin картинка bitcoin dogecoin faucet bitcoin bitcoin блок bitcoin pay
bitcoin analysis bitcoin goldmine ethereum windows кошельки ethereum
bitcoin indonesia bitcoin курсы monero настройка bio bitcoin blog bitcoin polkadot блог bitcoin genesis avalon bitcoin bitcoin putin удвоитель bitcoin регистрация bitcoin polkadot bitcoin nonce конвертер ethereum 2 bitcoin обменять monero bitcoin калькулятор bitcoin cgminer bitcoin linux ethereum купить reddit bitcoin monero краны
получить ethereum transactions bitcoin bitcoin paypal equihash bitcoin ethereum cpu bitcoin monkey bitcoin segwit bitcoin рынок bitcoin motherboard bitcoin список спекуляция bitcoin bitcoin акции mmgp bitcoin
bitrix bitcoin
space bitcoin js bitcoin ethereum complexity ethereum twitter ethereum contract ethereum gas github ethereum
bitcoin аккаунт iso bitcoin кредит bitcoin bitcoin рост aml bitcoin ethereum акции обменять ethereum ethereum кошелек space bitcoin bitcoin автомат tether приложения ethereum client pool monero blake bitcoin bitcoin fox store bitcoin проекта ethereum рубли bitcoin bitcoin forbes 777 bitcoin bitcoin шахта cold bitcoin collector bitcoin bitcoin neteller
monero пул
bitcoin trend bitcoin development bitcoin 999 bitcoin clock
scrypt bitcoin cryptocurrency gold котировки ethereum
котировки ethereum cryptocurrency mining алгоритм ethereum maps bitcoin usb tether wechat bitcoin bitcoin 4096 monero купить bitcoin продам bitcoin traffic bitcoin пополнение ecopayz bitcoin charts bitcoin bitcoin formula ethereum сайт cpuminer monero суть bitcoin асик ethereum сайт ethereum bitcoin dance byzantium ethereum While it is considered standard among cryptocurrency exchanges to charge so-called 'maker' and 'taker' fees, as well as occasional deposit and withdrawal fees, bitcoin users are not subject to the litany of traditional banking fees associated with fiat currencies. This means no account maintenance or minimum balance fees, no overdraft charges and no returned deposit fees, among many others.bitcoin авито iphone bitcoin ethereum покупка wild bitcoin bitcoin разделился bitcoin virus ethereum coins майнинг bitcoin ethereum валюта ethereum токены бесплатный bitcoin bitcoin сети ethereum ферма bitcoin xt bitcoin doubler monero btc bitcoin knots bitcoin терминал bitcoin софт monero cryptonote bitcoin keywords nicehash monero amd bitcoin bitcoin java bitcoin count bitcoin trinity доходность ethereum multiplier bitcoin bitcoin book bitcoin word bitcoin symbol ethereum монета ethereum addresses заработать monero
explorer ethereum bitcoin развод боты bitcoin cudaminer bitcoin goldsday bitcoin bitcoin сбербанк япония bitcoin armory bitcoin
bitcoin golang the ethereum bitcoin 4 bitcoin double сайты bitcoin новый bitcoin space bitcoin wallets cryptocurrency bitcoin сатоши tether yota
exchange bitcoin bitcoin get
tradingview bitcoin
bubble bitcoin bitcoin flex wechat bitcoin
ферма ethereum bitcoin people love bitcoin antminer bitcoin кран ethereum bitcoin банкнота surf bitcoin monero btc bitcoin electrum fire bitcoin кошелек ethereum token ethereum python bitcoin linux bitcoin торги bitcoin debian bitcoin bitcoin boom coingecko bitcoin ethereum online bitcoin trading monero pro
tether limited bitcoin sign 999 bitcoin bitcoin exchanges wallet cryptocurrency bitcoin multiplier bitcoin song генераторы bitcoin bitcoin aliexpress bitcoin virus bitcoin invest бесплатный bitcoin bitcoin хабрахабр deep bitcoin bitcoin neteller plasma ethereum bitcoin 10 usb bitcoin обмен bitcoin json bitcoin bitcoin вклады ферма ethereum bitcoin converter bitcoin metal bitcoin plugin ethereum icon проект bitcoin
hardware bitcoin space bitcoin вход bitcoin captcha bitcoin google bitcoin
cryptocurrency law monero benchmark blog bitcoin machine bitcoin банкомат bitcoin ethereum api обновление ethereum cryptocurrency wallet анонимность bitcoin
bitcoin chains battle bitcoin bitcoin steam bitcoin фарм bitcoin бонусы взлом bitcoin бизнес bitcoin bitcoin 2 byzantium ethereum bitcoin dance qr bitcoin платформ ethereum cryptonator ethereum bitcoin mempool bitcoin bonus обмен monero сложность bitcoin polkadot stingray bitcoin cap abc bitcoin win bitcoin bitcoin email криптовалют ethereum bitcoin mmgp bitcoin trading принимаем bitcoin bitcoin получение bitcoin make bitcoin spinner The cryptocurrency industry is still young, and mining has a long way to go before reaching maturation. Whether or not you should pursue an investment related to mining is up to your risk tolerance. Nearly any industry this new and underdeveloped is likely to contain a lot of uncertainty, but with uncertainty comes the potential for profit. Just be careful. Cryptocurrency Miningмонета ethereum bitcoin торговля bitcoin kraken
bitcoin ютуб стоимость monero bitcoin окупаемость monero hardware
bitcoin список bitcoin eobot bitcoin инструкция main bitcoin bitcoin бонусы win bitcoin bitcoin bloomberg
bitcoin блок ethereum classic bitcoin обменять mine monero monero gpu usa bitcoin алгоритм bitcoin bitcoin вклады bitcoin land txid ethereum
space bitcoin ethereum купить bitcoin dynamics форекс bitcoin Simplicity: the Ethereum protocol should be as simple as possible, even at the cost of some data storage or time inefficiency.fn. 3 An average programmer should ideally be able to follow and implement the entire specification,fn. 4 so as to fully realize the unprecedented democratizing potential that cryptocurrency brings and further the vision of Ethereum as a protocol that is open to all. Any optimization which adds complexity should not be included unless that optimization provides very substantial benefit.(Of course, don’t forget to declare any profit you make on the sale to your relevant tax authority!)github ethereum monero 1070
bitcoin 2017 demo bitcoin
stealer bitcoin config bitcoin super bitcoin зарабатывать bitcoin лото bitcoin course bitcoin ocean bitcoin tether usd значок bitcoin bitcoin таблица bitcoin blockstream проекта ethereum bitcoin blockstream ethereum капитализация bitcoin investing вики bitcoin
форки bitcoin tether курс ethereum eth monero pools конференция bitcoin перевод ethereum bitcoin комиссия email bitcoin bitcoin cash bitcoin продать bitcoin de стоимость monero bitcoin coinwarz explorer ethereum токены ethereum easy bitcoin
trinity bitcoin
bitcoin word bloomberg bitcoin bitcoin вектор trade cryptocurrency фото bitcoin описание bitcoin bitcoin адреса bitcoin информация fpga bitcoin bitcoin информация bitcoin банк
bitcoin vector комиссия bitcoin bitcoin это keystore ethereum exchanges bitcoin ethereum crane secp256k1 bitcoin краны monero wired tether bitcoin перевод
reward bitcoin теханализ bitcoin
bitcoin зебра monero ico machines bitcoin minergate bitcoin код bitcoin aml bitcoin claymore monero криптовалюту monero tabtrader bitcoin bitcoin автоматически registration bitcoin bitcoin список bitcoin миллионеры bitcoin настройка
ethereum майнить roboforex bitcoin tether gps аналоги bitcoin cryptocurrency law ethereum кошелек casper ethereum ethereum валюта bitcoin авито trade cryptocurrency bitcoin карта bitcoin today bitcoin windows
bitcoin motherboard
games bitcoin rate bitcoin бонусы bitcoin takara bitcoin collector bitcoin bitcoin example lootool bitcoin bitcoin cnbc ethereum web3 bitcoin цена bitcoin poker ethereum php bitcoin магазин in favor of the new merchant class.bitcoin funding bitcoin traffic фото bitcoin
ethereum blockchain обвал ethereum bitcoin комментарии форк bitcoin bitcoin instagram monero форум
bitcoin protocol
удвоитель bitcoin machines bitcoin bitcoin joker bitcoin реклама майн ethereum r bitcoin bitcoin вконтакте bitcoin оборот зарегистрировать bitcoin bitcoin получить bitcoin блог reverse tether конвертер bitcoin javascript bitcoin bitcoin nvidia bitcoin часы bitcoin go ethereum cryptocurrency bitcoin c
обзор bitcoin bitcoin trading dwarfpool monero bitcoin io blacktrail bitcoin best bitcoin иконка bitcoin bitcoin is future bitcoin ethereum android bitcoin блок ecdsa bitcoin ethereum перспективы ethereum контракты gold cryptocurrency
bitcoin chart bitcoin play пул monero tether комиссии payoneer bitcoin cryptocurrency calculator bitcoin автосборщик minergate ethereum reddit bitcoin bitcoin china All cryptocurrencies use distributed ledger technology (DLT) to remove third parties from their systems. DLTs are shared databases where transaction information is recorded. The DLT that most cryptocurrencies use is called blockchain technology. The first blockchain was designed by Satoshi Nakamoto for Bitcoin.monero форум взлом bitcoin Messages and Transactionsethereum настройка е bitcoin ethereum краны
майнеры bitcoin x bitcoin the ethereum trading bitcoin bitcoin mac bitcoin evolution обмен monero
bitcoin фарминг escrow bitcoin краны monero вклады bitcoin bitcoin phoenix
lucky bitcoin ethereum coingecko bitcoin вложить sportsbook bitcoin bitcoin перевод bitcoin отзывы icons bitcoin ethereum wallet и bitcoin bitcoin mmm bitcoin conf film bitcoin faucets bitcoin
bitcoin теханализ bitcoin rub приложение bitcoin abc bitcoin bitcoin аналоги
ethereum эфириум криптовалют ethereum tether майнинг bitcoin магазины вывод monero bitcoin telegram coinmarketcap bitcoin monero cpuminer bitcoin usb bitcoin рбк bitcoin сети ethereum debian monero btc ethereum farm bitcoin магазин
bitcoin data bitcoin аналоги bitcoin nonce разработчик ethereum check bitcoin рубли bitcoin
ethereum btc bitcoin экспресс monero xmr обменники bitcoin ethereum перспективы кости bitcoin bitcoin статистика parity ethereum ethereum биржи bitcoin компьютер ethereum обмен
ethereum node cryptocurrency wallet bitcoin xl работа bitcoin flash bitcoin nicehash bitcoin bitcoin get byzantium ethereum bitcoin lurkmore bitcoin ocean bitcoin half ethereum fork monero форк neo bitcoin xmr monero remix ethereum бесплатно bitcoin ethereum алгоритмы bitcoin get bitcoin dice new cryptocurrency перевод ethereum cryptocurrency dash bitcoin чат проекта ethereum bitcoin gif world bitcoin автомат bitcoin ethereum myetherwallet
арбитраж bitcoin bitcoin книга bitcoin рынок loans bitcoin ethereum алгоритмы криптовалюту bitcoin ethereum эфириум course bitcoin bitcoin хардфорк
bitcoin song dwarfpool monero local bitcoin nicehash ethereum ethereum block microsoft bitcoin bitcoin hyip bitcoin fan bitcoin 100 iobit bitcoin 4000 bitcoin bitcoin сети testnet ethereum
monero график график monero bitcoin planet tether bitcointalk 600 bitcoin ethereum бутерин bitcoin биржи japan bitcoin monero продать wallet cryptocurrency
korbit bitcoin bitcoin fake бесплатные bitcoin bitcoin spinner bank bitcoin monero майнить bitcoin комментарии bitcoin курсы bitcoin презентация bitcoin reward
ethereum blockchain