Ключевые слова: b, background, bit, bitcoin, blockchain, btc, business, buy, cash, chart, coin, commerce, concept, conceptual, cryptocurrency, cryptography, currency, diagram, digital, ecommerce, economy, electronic, exchange, finance, financial, global, gold, golden, graph, growth, investment, letter b, many, market, monetary, money, network, pay, payment, shop, shopping cart, sign, stock, store, symbol, technology, trade, virtual,