I think most would just revert to cash if their is enough liquidity around to support it and have pretty high turn over! In some cases it may just be an IOU that is traded and can be redeemed! In many parts of Africa we use airtime and data as currency and trade that too
But yes any accounting system can work in a crisis in theory as long as everyone agrees! It’s just that people will default to the easiest form of currency
Have you seen the pictures of cash currency in the gutter and in trash bags after hyper inflation?
Yes I have, Zimbabwe is next door and we’ve seen it play our first hand
Right, this brings to mind how after the introduction of the Euro the old Deutsche Mark bills continued circulating on the Balkans for several months, where people had been using them previously instead of their highly unstable national currencies. It doesn't matter though. They may just as well have used coat buttons, since it is their agreement among each other that gives value to a currency.