Ключевые слова: altcoin, banking, black, block, blockchain, business, cash, chain, coin, commerce, concept, contract, contracts, crypto, cryptocurrency, currency, decentralized, digital, ecommerce, economy, electronic, exchange, finance, financial, internet, investment, market, metal, mining, money, pay, payment, peertopeer, physical, smart, storage, symbol, trade, tron, trust, trx, virtual,