gold and silver is a store of value. they have bought the same type/amount of goods since forever.

a one ounce gold coin in ancient Rome will get you outfitted with a top quality toga or whatever they wore back then; the same dollar value of a one ounce gold coin will buy you a damn nice men's suit or dress.

yes, you will need to exchange it for currency before buying your threads. BFD. The value remains unchanged.