Ключевые слова: abstract, background, block, blockchain, business, code, coin, commerce, computer, concept, crypto, cryptocurrency, cryptography, currency, dark, dct, decent, design, digital, ecommerce, electronic, exchange, finance, futuristic, hand, honeycomb, icon, industrial, internet, laptop, man, miner, mining, money, net, network, online, pay, payment, shopping, sign, smartphone, software, symbol, technology, trade, transaction, virtual, web, world,