I was really trying to address the gold is for saving, silver is for spending because gold conveys too large of value to be convenient for spending train.That is flawed thinking. You will not need gold in smaller amounts because in such a situation those values will be meaningless.
You talk only about gold here, but I assume you think silver is also not good to acquire, since it can't be eaten either. I'm certainly not sure, but I think silver (and gold) will have utility, post-apocalypse, because a 'medium of exchange' is just too good of an idea to go away completely. Sure its value will fluctuate relative to other goods but I don't think it'll go to zero or even near-zero. The medium of exchange, assuming I can find someone to trade to or from precious metal lets me sell my excess tomatoes today while they're fresh, without having to anticipate whether I'll need a box of nails or a chicken more, next week. It saves me having to find the one guy in the area that wants some (nice...delicious...juicy) tomatoes as much as he wants to get rid of his extra chicken.
MrB