End of the day, that's why bitcoiners say not your keys not your coins. It's the only way to know for sure. Everything else is a nonzero custodial risk.
All these structures you're talking about are simply the legacy system rebuilt on a digital platform and effectively produces no real solutions. It only presents solutions to problems they created themselves - no different from the legacy fiat financial system as a whole.
Yes, look at Enron. Look at FTX. *insert find the difference between these two pictures meme*
The only real innovation here is the bitcoin network. If it sits anywhere else, you're just risking your wealth for price exposure or convenience.