Ключевые слова: 2016, 2017, 2018, background, banking, bit, bitcoin, black, blackboard, board, business, businessman, by, chalk, choice, coin, commerce, concept, corporate, creative, cryptocurrency, currency, design, diagram, digital, drawn, electronic, element, exchange, finance, financial, graphic, hand, icon, idea, internet, investment, money, step, steps, symbol, virtual, walking, white,