Ключевые слова: background, birth, bitcoin, block, blockchain, btc, business, card, cash, chain, circle, closeup, coin, coins, crypto, cryptocurrency, currency, cyberspace, electronic, electronical, encryption, exchange, finance, fire, flat, gold, golden, hot, icon, isolate, isolated, made, market, miner, mining, money, pay, payment, physical, pot, protocol, shining, symbol, technology, top, trade, view, virtual, workshop, yellow,