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?
I don't think it is a too bad idea to leave our coins on exchanges, but make sure the exchanges have good history and are friendly to their members. Of course, no exchanges are secure enough, all exchanges are possible to be hacked. However, several exchanges want to refund their members' money once there is a hack. I am sure Binance is one of the exchanges that have responsibility if there is a hacking case. So, I think we have no reasons to be so worried about our money. But never put all our money on exchanges, just put the amount of money that we can afford to lose.
Don't find this as a gamble. With gambling users will be suggested to spend what one can afford to lose. An exchange is different, every exchange have got security issues which gets updated often. With this we can have trust over the platform and keep the funds that are being used for trading and not the amount that can be afford to lose. If the plan is for long term holding, then never look for exchange. Find the best wallet and secure the amount, and keep the recovery seed safe.
Binance is most users choice when it comes to exchange services, due to its good history and listing of more trading pairs. With time something advanced in the exchange platform could come or everything could go as DEX.