In that scenario most of the food has gone bad anyway and is stuck in distribution centres as the shops can’t send orders up through the supply chain.
Also, without power most places couldn’t take cash. Tills are computers that do all the maths so the 16 year old serving you doesn’t have to they also track inventory going out.
The cash that there is is stuck in banks because the banks have no way of knowing what money is yours as we haven’t had bank books for like 20 years already.
schnurrito@discuss.tchncs.de 12 hours ago
The existence of cash is probably the least of one’s problems in that scenario. How is food going to be delivered to stores without working gas pumps? How will stores open their electronic doors or process payments without a cash register?
If this is something you are worried about, store enough non-perishable (eg canned) food in your home so you don’t starve in that scenario.