Underground this is a very interesting concept I had not thought about. This would be a great way to quit funding our corrupt gov. Pay for everything in legal tender in precious metal. Tax being payed on face value. Talk about finally getting your moneys worth. The only problem I see is the amount of precious metal currency available does not match the population. On the other hand, if enough people would get on board and start operating this way the value of the metal would most likely go way up. I doubt it would take long for the gov to find a way to make this action illegal but it would be a great way to fight fire with fire.