If it's about the best exchange, I choose Binance as the best exchange in 2020, and I don't use the other option from @OP. I wonder why BitMEX is not on the list because BitMEX is a good exchange so far. KuCoin is also not on the list, so I think @OP can add more options to have more exchanges to select. This year, I think many exchanges will try to compete, and maybe Binance will have more competitors at the crypto exchanges. But I am sure that if Binance can manage or maintain their services better than before, they will still be the best exchange this year.