Storing our valuable BTC in an exchange is one of the biggest mistakes we can make. Once exchange is hacked, our funds will be lost and we won't be able to recover any losses.
"Not your keys, not your coin" clearly explains and warns enthusiasts against keeping their assets under the watch of a third party, and doing this puts one's assets and funds at risk because the CEX can not guarantee their safety not to talk of assets kept under their custody and besides, there have been lots of hacks on cex so what confidence would one have in keeping their assets with cex after hearing about all these big hacks on cex. So, after hearing all these and you still go ahead to keep your funds with them, whatever outcome that emanates, you should be able to face it as you were warned.