Ключевые слова: bank, banking, banknote, bill, bit, bitcoin, blockchain, btc, business, buy, cash, coin, commerce, computer, concept, crypto, cryptocurrency, cryptography, currency, digital, dollar, economy, electronic, ethereum, exchange, finance, financial, gold, golden, international, internet, investment, litecoin, market, metal, mining, money, network, pay, payment, pln, polish, symbol, technology, trade, value, virtual, web, zloty,