Curious about the viability of this..I like the idea of keeping savings on hand, and due to mistrust of the government, I like to keep my finances under the radar whenever possible. It is my understanding that metals are a pretty solid investment, have established value worldwide, and are less likely to plummet through the floor than currency. Is this the case? If so, what metals are best? Palladium? Gold? Platinum? Depleted Uranium?