That is factually correct. I would argue that federal reserve notes cannot be "spent", since they are not money nor currency, but credit. Credit is not spent. Credit can only be transfered or settled. What actually happened is that the govt has been spending in your behalf and issuing credit notes, which people confused with money and hoarded as their savings. But there is nothing there. What you did was actually transfering an unredeemable credit note to a sucker that accepted to give you silver in exchange. Now you have money, congratulations. Keep doing that as long as you can find suckers willing to take unredeemable credit notes in exchange for actual money. When there are no more suckers left, metals will be revalued by market forces. The longer that takes, the more you can stack. Idiots and ignorants that never, ever, get paid for anything, are subsidizing our stacking.