Ключевые слова: block, blockchain, business, cash, center, coin, computer, concept, connection, crypto, cryptocurrency, cryptography, currency, design, digital, electronic, equipment, exchange, finance, financial, flat, hardware, hosting, icon, icons, illustration, internet, isometric, isometry, key, laptop, money, network, online, pay, payment, rack, room, technology, transaction, transfer, ultraviolet, virtual,