Earlier quoted context omitted.
value(canned food) > value(bullets) > value(gold)
Gold is an universal store of wealth. Canned food and bullets not so much. It's a different kind of value.
The context of this subthread is SHTF situations, where all that matters is inherent value determined by the laws of nature. What good is your gold if nobody wants to take it for even a tuna sandwich or if you have a loaded gun pointed at you?