I agree 100% that gold and/or silver has little intrinsic value post SHTF, and--given a choice between canned food or a stash of silver coins if I was stranded on a desert island--I would, of course, opt for the canned food.
Yet I find it very difficult to disregard history.
There are many stories passed down (from my father's side of the family) about Jewish relatives who escaped concentration camps, got to board boats, and traded for food and medicine with hoarded silver, gold, and precious stones.
There was even a story about a Jew who was turning in his fellow Jews to the S.S. in exchange for continued freedom and favors . . . so hoarded gold and silver was used to finance a hit on him, and to send a lesson to like-minded cowardly bottom feeders . . . as his body was, supposedly, quite mutilated in unpleasant ways.
There are similar stories from my mother's side of the family about gold being used by her Lakota ancestors to buy guns from unscrupulous whites in order to defend their lands.
Even today in the Arab culture (and other middle-eastern societies), jewelry is used to quietly move wealth across international boundaries (and has been used in this way for over a thousand years), and to finance terrorism . . . as jewlery can't be tracked like bank transfers and money wires.
If we take these points into consideration, then I believe that gold and silver may be more important than we give it credit for.