Why does this need to be regulated? We already have banks for that. And it's not like regulation saved them from being able to become insolvent.
It may have, in a way.
It's too early to tell, but it's possible that FTX's USA-based corporation ("FTX US") is still solvent. I believe it's the Bahamas-based entity that's in bankruptcy - the one that's in an offshore haven not subject to US regulations.
Edit: Looks like FTX US is bankrupt too, but still it may or may not be solvent.