Ключевые слова: 100, abstract, american, background, bank, banking, banknote, bill, bit, bitcoin, blockchain, business, capital, cash, closeup, coin, concept, crypto, cryptography, currency, digital, dollar, economy, electronic, exchange, finance, financial, gold, internet, investment, market, mining, monetary, money, network, paper, pay, payment, pile, rich, saving, sell, stock, success, symbol, tax, usd, virtual, wallet, web,