Ключевые слова: abstract, anonymous, background, bank, banking, banknote, bit, bitcoin, blockchain, business, buy, chart, chip, code, coin, commerce, computer, concept, crypto, cryptocurrency, currency, cyber, data, digital, dollar, electronic, euro, exchange, finance, financial, global, graph, icon, internet, market, mining, money, network, online, payment, security, sign, symbol, system, technology, transaction, virtual, wallet, web,