Earlier quoted context omitted.
When you join a startup, you don't really think about their traditional bank failing as a risk factor. It's a step away from "what if the office collapses in an earthquake" or some other p9999 off-chance risk.
When you join a startup, you are thinking that there's a good chance the startup will fail. The exact mechanism isn't in your thoughts, because it doesn't really matter.
I'm an employee of one of these companies and I joined with the knowledge that it might fail, but with plans to bail quickly if it looked like it was heading that direction. Given the current size of the company I joined, I expected that to be on the scale of weeks to months, not two days.
(I do have the funds to deal with some amount of payroll fuckery, and don't plan to immediately do anything unless this gets much worse next week.)