Ключевые слова: agreement, application, bitcoin, blockchain, business, cash, client, communication, computer, concept, cryptocurrency, cryptography, currency, data, digital, economy, exchange, finance, fintech, hand, hold, icon, interface, internet, market, model, money, network, online, p2p, payment, payments, peer, peer to peer, peering, peertopeer, people, protocol, screen, server, service, stock, support, technology, trading, transfer, virtual, wireframe, world,