Really I'm very upset with this exchange... They have one of the most expensive withdrawal fees I've ever see... I saw this kind of abusive fees in other exchanges like yobit but I tought HITBTC will be a little more serious due to the fact its great volume... They don't need to charge those abusive fees... Really... If they doesn't change their politics I think I will withdraw all my fund from there (despite the fact they will thieve me in every withdrawal I'll make) 
Yes, I agree. But if you want to withdraw, I think you need to convert into the other coins which have a cheap transaction fee so you don't have to pay the high fee. It is what I did if I want to withdraw and I never use bitcoin for making a withdraw because it's too high for the fee. So next time, you can try with waves, doge, or the other coins and I think it still worth for you.
They do really have high fees which minimal trades or transactions wont really be idea because all would be just eaten up mostly on withdrawal fees.