Ключевые слова: accounting, background, bank, banking, bitcoin, block chain, business, calculator, card, cash, coin, commerce, concept, conceptual, credit, crypto, cryptocurrency, cryptography, currency, digital, dollar, ecommerce, economy, electronic, exchange, finance, financial, gold, golden, hand, holding, icon, internet, investment, market, monetary, money, network, pay, payment, profit, saving, set, sign, symbol, technology, trade, virtual, wealth,