I mean, it kinds seems inevitable to me. Books has become e-books. Cash is becoming digital transfers. China has done it. The west is mostly doing card-swipes. One day, that transition will be complete, and cash would be phased out.
What happens then? Think like the power outage in Spain recently. Some people had cash. But in 20-40 years. There might not even be any cash in existence. What then?
What if, instead of a few hours, its a few days? Or weeks?
I guess riots break out all around the world?
(Seriously, has none of the politicians ever thought about this? Where are the backups? Are we just going full “YOLO” on the reliance on the power grid?)
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.