Next year, the US mint will stop making pennies due to inflation. Next will be nickles, then dimes... and so on. A big mac meal is already $20. You already need to carry a $100 to feed your family at the cheapest restaurant in the US. But they're not printing bigger bills. They'll continue to stop making small change. And then one day, you won't be able to buy anything without a card. A card which can be remotely terminated if you're a bad boy who attended the wrong protest.