Ключевые слова: background, banking, bit, bitcoin, blockchain, business, buy, cash, circle, coin, concept, crypto, cryptocurrency, cryptography, currency, digital, economy, electronic, exchange, finance, financial, future, gold, golden, hacker, internet, invest, launder, market, miner, mining, money, network, pay, payment, rich, safety, secret, shine, sign, suppose, theft, trade, virtual, wealthy, web,