Collect silver after you have enough

• Food
• Water processing capability and supply
• Weapons and Ammo
• Medical Supplies

Because these things will not be available if we get to a state where Silver is required.  I can tell you I would not sell my items for all the silver in the world if I became dependent on the.  A Fifth of Jack Daniels will go a lot further than an ounce or two of silver and it costs about the same.