Ключевые слова: alternative, banking, bitcoin, blockchain, btc, business, buy, contract, cryptocurrencies, cryptocurrency, cryptography, currency, dash, decentralized, digital, digital currency, economy, electronic, encryption, ethereum, exchange, financial, flag, internet, investment, litecoin, monero, money, nem, neo, network, p2p, payment, ripple, sell, technology, trade, trading, transfer, virtual, zcash,