Ключевые слова: anonymous, background, bank, banking, banknote, bit, bitcoin, blockchain, business, buy, cash, coin, concept, crypto, cryptocurrency, cryptography, currency, digital, dollar, ecommerce, economy, electronic, exchange, finance, financial, gold, golden, internet, investment, market, mining, money, net, network, note, paper, pay, payment, savings, sign, symbol, technology, trade, transaction, usd, usdollar, virtual, web,