Don your tinfoil hats for a moment.
I’ve now seen this commented on everywhere, though nobody has confirmed anything. The question is whether or not we are going to get an FDR-style bank holiday. You may be interested in a Fed Research Paper on the subject. The FDIC should make such a holiday unnecessary, though not for big accounts. One outcome of the holiday was the restoration in trust in the banks (sort of). The other outcome of the holiday was confiscating gold and the devaluing of the US dollar. I’m not convinced that actually requires a bank holiday since we have a fiat currency.
Instead of predicting a bank holiday or a US sovereign default, I would up my bid on a cascade collapse coming through Europe.
You may now remove your tinfoil hats.