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?
I guess they are the underrated exchanges at the moment,a lot of people recommending it. Kucoin,people are recommending it for listing new ico coins and binance it has no fees for a few altcoins like neo and gas i guess. Bittrex I dont know what is going to happen they have been banning and blocking access to some of its users and poloniex aren't listing any coins and their daily withdrawal limit is low.. So maybe we are going to see a new exchanges taking over bittrex and poloniex.