I was regular trader in bittrex exchange before binance came. May be bittrex was the legit platform to trade that time. But when binance arrived with lots of new idea and give trader a new trading benefit, people automatically choose binance for trade. I trade in bittrex a year ago. I heard they improved their platform but i don't think they are capable of competitor with binance. Not just bittrex, no exchange are capable of competitor with binance at this moment. Binance is now no. one exchange in crypto space.