Sam Bankman-Fried warns that some exchanges are "secretly insolvent." How can I tell if mine already is?

I just kinda like Sam, the young billionaire who heads Alameda Research and FTX. Although he has thrown in about $750 million to help rescue some failing crypto firms, Sam has come out to warn that some crypto exchanges are secretly insolvent. In case you don't know what this means, this implies that your kept tokens might become withheld or confiscated in the event of massive liquidation.

But what does this actually mean as I'm considering buying some tokens like $CRO, Proton XPR, $Eth and Toklok $Tol. Does this mean keeping them in my CEX waller may not be the best thing to do, just in case my exchange is insolvent already. Or what parameters could tell when an exchange is becoming insolvent… so I can know when to pull out my funds?

While I feel terrible for those who have funds trapped in Celsius, 3AC and some other embattled CeFi/DeFi. Knowing when an exchange is becoming insolvent could actually help me know when to extract my funds before the panic selloff begins.