If I have all the food I need (and then some) in some crazy collapsed society event, chances are I will not be standing on my roof top shouting "I HAVE FOOD! DO YOU WANT TO BUY SOME?"In every economic situation there is going to be the "haves" and the "have nots". The people that have everything they need to survive don't need what you have. Meaning if you are hungry and everything you have of value to trade isn't needed or wanted by the guy who has food for you
So the guy with no food and loads of precious metals will not know, they will starve and all the metals they stored will be left buried in the ground for someone else to find!
Also...... In such a event.......
How would a person who had more food than they needed trust a outsider to make a trade of some "gold" for grub?
How would they know if they was walking into a trap to robbed of their food? Killed for their stores!
How would the person with the extra food know whether your gold or silver is not fake? Or partially faked?
Gold bars from reputable mints have been split in half, hollowed out and filled in with lead and put back together, probably soldered with gold at the seam, reworked so no one could notice by eye
You can see my green beans are real.