itBit Exchange Review 2021: Supported Currencies, Fees, Deposits, Withdrawals and More. With increasing popularity of cryptocurrencies, there are a diverse range of cryptocurrencies hitting the platform, but very few of them are regulated. If you are looking for a regulated exchange, which offers high liquidity and enhanced security features, then US based itBit exchange by Paxos is the best choice for you. This review will help you understand everything about itBit exchange to begin with. Read about itBit fees, trading, deposit, withdrawal, guides and more.