Ключевые слова: background, bank, banking, bit, bit coin, bitcoin, bitcoin business, bitcoin mining, blockchain, btc, bubble, business, businessman, buy, cash, coin, commerce, concept, crypto, crypto currency, cryptography, currency, digital, economy, electronic, exchange, finance, financial, future, gold, golden, international, internet, investment, man, market, mining, monetary, money, pay, payment, person, purchase, sign, suit, symbol, trade, virtual, web, young,