Ключевые слова: abstract, background, bank, banking, bit, bitcoin, blockchain, btc, business, buy, cash, coin, coins, commerce, computer, concept, crypto, cryptocurrency, currency, digital, dollar, dollars, ecommerce, economy, electronic, exchange, finance, financial, global, gold, internet, investment, market, metal, mining, money, network, paper, pay, payment, ripple, silver, symbol, technology, trade, virtual, web, xrp,