Fees, that's the only issue I have at the moment, and as an active trader it makes things more difficult, I make use of an exchange that provides quality security service and other additional pecks,but I do a lot of trading and a lot of moving coins here and there, the fees are quite a hiccup sometimes
and in fact, of all the listed problems, which are very annoying to users, for me, the most important thing is tariffs. In any case, I always did not trust more than one exchange, Because there are always some nuances, Where I can either lose money, or some situation will appear, which will lead again to losses. Kys Khadya because of this, I never for a long time leave my coins in the wallets of trading platforms and exchangers.