Which BitcoinX are you talking about. Incidentally there are two BitcoinX coins, that is BTX and BCX.
BTX has no known market according to info on coinmarketcap and their provided website is dead (The Certificate expired a while back and domain is up for sale) while BCX can be traded on a number of exchanges including Huobi Global, Gate.io
More information here:
https://coinmarketcap.com/currencies/bitcoinx/markets/reported/There are BCX exchanges on many exchanges, but BCX cannot be made. Exchanges do not accept BCX
Обмен BCX есть на многих биржах, но депозит BCX не сделать. Биржи не принимают BCX