Ключевые слова: background, bit, bit coin, bitcoin, bitcoin network, business, buy, cash, cash system, closeup, coin, commerce, concept, conceptual, crypto, crypto currency, cryptocurrency, cryptography, currency, digital, ebusiness, ecommerce, economy, electronic, exchange, finance, financial, gift, gold, golden, heart, hearts, internet, isolated, love, market, metal, money, network, pay, payments, red, shining, sign, support, symbol, virtual, worldwide,