As for the trading of cryptocurrencies and fiat currencies, there are trading pairs that are always liquid around the clock like BTC/USD and those that are not such as BTC/PHP and BTC/IND. Only nine fiat currencies are traded with volume over 10 million USD per day: USD, CNY, JPY, EUR, TRY, GBP, KRW, IDR, and PLN (24-hour trading amount on October 25, 2020, Coinmarketcap.com).