Ключевые слова: abstract, background, bank, banking, bit, bitcoin, bitcoins, blockchain, btc, business, cash, catch, coin, color, concept, conceptual, cord, crypto, cryptocurrency, cryptography, currency, digital, draw, ecommerce, electronic, ethereum, finance, financial, find, gold, golden, group, handful, hang, investment, lace, litecoin, lots, magnet, market, neodymium, payment, risk, rope, silver, souvenir, virtual,