Interesting! I'll look into it. Though I question whether a "currency" needs to be backed by something "real." Currencies are simply a leger system to allow people to barter when they don't agree on what they want to trade. You can always barter a currency because you can trade it with someone else for something you want. That is what gives it value, not being backed by something. That is what makes a commodity different, it has value besides being tradeable. Gold is nice because it can be both, a currency and a commodity. But this unfortunately makes the commodity value of gold go down because the currency value makes the price higher making it unprofitable to use it as a commodity. Hopefully that makes sense. I am writing a post about it right now actually so stay tuned! :)