Ключевые слова: 100, abstract, anonymous, background, bank, banking, banknote, bit, bit coin, bitcoin, blockchain, business, buy, cash, chip, code, coin, commerce, computer, concept, crypto, cryptocurrency, currency, cyber, data, digital, electronic, euro, europe, exchange, finance, financial, internet, microchip, mining, money, network, online, payment, security, sign, symbol, system, technology, transaction, virtual, wallet, web,