Ключевые слова: abstract, accounting, background, balance, bank, banking, bitcoin, block, blockchain, bookkeeping, building, business, cash, chain, code, coded, commerce, communication, concept, cryptocurrency, cryptographic, currency, data, digital, display, economy, electronic, exchange, figures, finance, financial, future, horizontal, icon, information, investment, ledger, monetary, money, numbers, page, paper, paperwork, payment, retro, security, sharing, technology, text, transfer,