Most users call binance the best. I'm sure the best crypto currency trading platform is bitfinex.
This is purely my subjective opinion and I dont urge others to assert the same. This is the 1st exchange I started using and is most used to it. Perhaps that's what shaped my opinion. If anyone wants to try bitfinex for the first time, then read this article first: https://cryptototem.com/bitfinex-review/. I guess this will save your personal time. If you don't like this crypto platform, then your acquaintance with bitfinex will end with this review.