Ключевые слова: background, banking, bitcoin, bitcoin cash, black wallet, business, cash, coin, concept, crypto, crypto coin, crypto currency, cryptocurrency, currency, digital, electronic, ethereum, exchange, finance, financial, gold, internet, investment, market, mining, money, pay, payment, pocket, purse, ripple, safety, savings, symbol, technology, trade, transfer, virtual, virtual wallet, wallet, wallet savings, web,