[chmod775]

Depends on the crisis and what you consider "currency". Hyperinflation is also a crisis.

More generally, in times where people would rather have useful things like food, tools, and gas than pieces of paper you'll be screwed if cash is all you have - because there's going to be one hell of a price hike. Even more so because economic output is likely to go down.

Then in case the crisis gets really bad it'll turn out you can't eat cash. Nobody is going to hand over food or other useful things in exchange for a few bits of paper with questionable value.

[megous]

> More generally, in times where people would rather have useful things like food, tools, and gas than pieces of paper you'll be screwed if cash is all you have...

This may be happening in some limited fashion even in the current crisis. My country still has its own currency within EU, and is undergoing unprecedented levels of lockdown over the last few days. The currency is already tanking compared to Euro (lost 4% over a few days), as people stockpile stuff.

https://www.xe.com/currencycharts/?from=EUR&to=CZK