Que "markets can remain irrational..." and "conspiracy nut" misdirection comments
I just want to add that without a government or currency, the value of silver and gold in the short-term would most likely fall. This is due to the fact that it is primarily used as a hedge against inflation (or a long-term value store.)
Here's a neat graph illustrating long-term PM prices during inflationary periods:
http://media.pimco.com/PublishingImages/PIMCO_Strategy_Spotlight_Johnson_Walny_Fig1.PNG