Ключевые слова: background, banking, bit, bitcoin, blockchain, btc, business, cash, closeup, coin, color, crypto, cryptocurrency, cryptography, currency, digital, ebusiness, ecommerce, electronic, exchange, finance, financial, global, golden, grey, hand, holding, international, internet, invest, male, man, market, miner, mining, money, net, operation, payment, penny, person, shopping, technology, trade, transaction, value, virtual, web,