Kucoin ever got hacked once until now but the good thing is they can recover the lost and no one of their customer lost their coin.

Not saying a hacked exchanges is bad, but it's normal since there always be a hacker in this space.. we only need to wait to see other exchanges got hacked.

Since there's an accusations on Binance Binanace Stuck My withdrawal on few days before, I'd like to recommend FTX right now.