Ключевые слова: attack, background, banknote, bit, bitcoin, bitcoinbusiness, business, buy, cash, circle, circuit, coin, concept, connect, cryptocurrency, cryptography, currency, dark, dollar, economy, electronic, exchange, finance, global, gold, golden, hacker, illustration, international, internet, isolated, market, metal, money, net, object, one, shining, shopping, sign, single, spy, symbol, system, virtual, virus, worldwide, yellow,