Ключевые слова: abstract, background, bank, barrel, bit, bitcoin, blockchain, btc, business, cactus, cash, coin, concept, cryptocurrency, cryptography, currency, cushion, decoration, design, digital, economy, electronic, exchange, finance, financial, gold, golden, green, icon, internet, isolated, law, market, mining, money, mother, pay, peer, plant, savings, security, spine, summer, symbol, thorn, trade, virtual, web,