Well that brings us to one of the spin offs of full bodied currency which is currency competition. We use banks and trust them to hold on to our money in the same way we would use currency producers or warehouse receipt issuers. The discussion goes to a whole other planet when we start talking about apocalyptic scenarios. Instead what Im talking about here is that the government lifts its monopoly on currency production. A newly issued private currency would operate like any other currency, except it would be exchangeable for a store of wealth and protect its value.
Imagine if you will a credit card from A-CAP'S TRUST. Now as long as ACT paid vendors in their preferred currency (just like we do now), the ACT currency would float around the market. ACT makes its money by speculating in currency (because as other currencies of the world inflate around it, the bet is practically guaranteed), seigniorage, and transaction fees.
As for a nationalized full bodied currency - that is more a romantic idea where government can't devalue my currency, and therefore steal my wealth, as I hold it in my hand or have it in a bank. Inflation is one of the greatest robberies and everyone seems to look the other way. Practically, however, we are too far entrenched in a government literally funded by hopes, dreams, and promises that to say "we actually have to have something to back it up" at this point would collapse the financial debt structure.
It would obviously take a lot more to convince people as smart as you all, Im just sketching broad strokes.