IMO at some point these sorts of disaster scenario thought experiments wind up in a place where if it happens, we're all pretty screwed anyways.

Do I have sufficient funds to survive for a while in a typical recessionary environment? Yes. If the shit really hits the fan, markets crash to next to nothing, real estate craters, etc and this lasts for multiple years well yeah. I'm in trouble. But that'll be true of just about everyone and we're probably looking at general societal collapse at that point.