At first, I want to suggest you don't hold your coin in any exchange for a long time, you can be lost your assets because no exchange is 100% safe! There are many exchanges that don't ask KYC for minimal trade, like Binance, Kucoin, IDEX, Digifinex and so on! They ask only email verification! Without registration, you can't use any good exchange except for some decentralized low-value exchange.
I always keep 30% of my assets at major exchanges and usually only use that money to invest in some coins to make a profit. Of course, I have been scammed at some exchanges like IDAX, Cryptopia so now I am very careful in depositing money at centralized exchanges.
Of course, there are still reputable exchanges like Binance and Okex but there is no certainty that these exchanges can remain active for a long time.