Ключевые слова: background, bank, banking, bit, bitcoin, black, blockchain, bronze, business, coin, commerce, concept, conceptual, crypto, cryptocurrency, cryptography, currency, dark, digital, economy, electronic, ethereum, exchange, finance, financial, gold, golden, internet, isolated, laundering, litecoin, market, mining, monetary, money, payment, ripple, silver, symbol, trade, virtual, web, white,