I agree that Binance is in the first position, because in my opinion Binance is the best exchange for now and all the volumes in Binance are 100% real, so trading on Binance is very easy and definitely give profit.
Binance has come after the fail of Bittrex's performance. I doubt Binance will keep first place if they don't change their business model to decentralized exchange. Binance's listing fee is more than 100K$ and this huge amount doesn't guarantee the entrance to biggest exchange in the cryptocurrency market.