HitBTC traders have been facing a lot of issues lately. The site is giving troubles like stopping the withdrawals, messing with user's trades, increasing the fees without any notices etc... These issues indicates that it is not at all safe now to trade on HitBTC as it might scam the users anytime. It is better to stay away from HitBTC and use better alternatives like bittrex, bitstamp etc... I recommend bittrex as it is most safer than others.
There are other exchanges to choose from so better stay away from the exchange if you can. There may be some history of problems in other exchanges as well but in their exchange there is a lot more complains. Some developers though still choose to list their coins in that exchange. Maybe it has lesser fee? Anyway, if you still have funds in the exchange then better withdraw it and transfer to others that has way lesser fees and somewhat safer. There is Bittrex, Binance, Bitfinex, Bitstamp, Kucoin which is somewhat new but getting volume slowly and others.