By all accounts, most of their demand deposits were invested in US treasuries. Those treasuries are just worth less now because of interest rate hikes and so ev

By all accounts, most of their demand deposits were invested in US treasuries. Those treasuries are just worth less now because of interest rate hikes and so even if they didn't have to do a fire sale on billions in treasuries, it still wouldn't be enough to cover deposits. There are no completely safe investments.