The 'Time Bomb' is fiat. Not things.
Things have value: Homes, automobiles, boats, airplanes, gold, silver, and....yes, a loaf of bread.
Here is a useful measure, intrinsic value.
The intrinsic value of a loaf of bread is a full stomach for a meal or two.
The intrinsic value of a fiat dollar is Zero (0).
There will ALWAYS be a market for cash and coins.