Ключевые слова: background, bank, banking, banknotes, bit, bitcoin, blockchain, btc, business, cash, coin, coins, commerce, concept, conceptual, crypto, cryptocurrency, cryptography, currency, digital, display, earnings, ecommerce, economy, electronic, euro, exchange, finance, financial, gold, golden, internet, invest, market, mining, mobile, mobilephone, money, payment, phone, sell, smartphone, symbol, trade, virtual,