Yup kucoin also has a great potential, i like their exchange very much 
Binance can handle hundred thousands of registrations, the question is Kucoin can handle that kind of influx? And why would people choose Kucoin over Binance?
BInance is the big exchange at the moment
more than 6 million users of registrations there. It is big potential BNB will be increase more in the future.