Sounds good but it is still vulnerable - one part of the Silicon Valley Bank collapse that was interesting to me was the money deposited in the bank was appeared to be money controlled by the same people who owned the bank.

IE, I suspect the decision makers behind the bank cared much more about bailing out the depositors of the bank - who were effectively complicit because they weren't shopping around - than the nominal shareholders of the bank. There were apparently specific requirements that startups used SVB if they received funding from certain VCs which suggests something was happening.