You forgot to mention the QuadrigaCX debacle, which has its own thread.
My bitcoin wallet is in my phone, with a paper backup in my basement. Nobody is going to empty it… although it’s possible bitcoin itself will become worthless.
It’s possible/necessary to use an exchange to transact between currencies, but for heaven’s sake just do your transaction and get out, don’t store anything there. But using an exchange as a bank, storing money (real “fiat” money or cryptocurrency) in a wallet/account managed by an exchange, is asking for trouble. It’s never clear when they’re going to go bust, but in the end almost all of them do, with or without scandal, and usually without warning.