Lately a new "Exchange 2.0" taking over. Bittrex & Polo suffer from many complains, locking accounts and many other issues.
Kucoin & Binance are quite different. they have their own token which give benefits.
Both are going very big in Asia and International.
Check out how Kucoin perform vs other exchanges:
https://www.kucoin.network/Your opinion?
Actually kucoin is good regarding the support and also its own token can give benefit to get lower fee for its holder. But the volume i think its not enough to replace thos two exchange. Regarding binance, i have no doubt with this exchange. Its very great for me.