Ключевые слова: background, bank, banking, block, blockchain, brokers, business, businessman, cash, chain, commerce, commercial, concept, construction, contract, currency, data, deal, development, digital, ebusiness, ecommerce, economy, electronic, exchange, finance, financial, global, growth, internet, investment, isolated, loan, man, market, miniature, mining, model, monetary, money, mortgage, network, office, purchase, sale, symbol, technology, trade, virtual,