I have most of mine on an exchange because I'm getting paid interest. Has there ever been a time when an exchange like Binance for example, steals your funds or gets hacked and people lost money?
Saving assets on exchanges will be always risky. The risks will depend on how good the exchange has security.
Like Binance itself, they will not steal our assets. But they may be hacked and this has ever happened several times ago that Binance has hacked. That is one of the risks or weaknesses of saving assets on exchanges.
So if we are saving for long-term investment, it is better to move the assets to offline or hardware wallets.
but if this is for trading or still used for other activities like staking or others, we can still use it on exchanges, but for me, I will only save it a litle bit, not all in the exchange.