Centralized exchange controls lots of investors funds making it site of attraction for hackers who continuously device means to pull funds from the centralized exchanges. You all still remember the 24th Feb. 2014, Mt gox exchange hack? Where huge amount of money was lost to hackers which lead to BTC drastic price fall.
To avoid stories that touches, I suggest holding assets in Decentralized wallet. Remember "Not your keys not your wallet"
Hackers go after all way possible to steal funds, the latest hack on solana took place through Slope wallet that doesn't belong to any crypto exchange, with a single fatal mistake from the Slope team many funds got stolen, in the crypto space anything can happen, only hardware wallet limit the risk but still not 100% risk-free.