One of the primary components of many WTSHTF or TEOTWAWKI scenario theories includes total economic collapse either as a primary or secondary factor. Once the monetary systems collapses, any economy relying on any type of fiat or debt-based currency will see its money supply become worthless. In such an event, commodities, i.e. things people want, will become paramount to local trade and personal welfare.
Commodities can be anything from precious metals such as gold and silver to food stuffs, tools, etc. Many preppers feel that silver is both relatively inexpensive and can be effectively subdivided in such a way that it might serve as a reasonable substitution for today’s currency – should such a currency lose it’s value. With the breakdown of the global supply chain for goods and services, local trade would be paramount to survival and comfort.