I know you are not necessarily advocating a commodity backed currency. I just wanted to make a brief comment regarding the difficulties of such.Quote from chasinfla:
and issues a digital, nominally gold and/or commodity backed world currency.
A hard asset backed currency can work among a limited number of nations who cooperate fully and agree on the mechanism for pricing the asset behind the currency, and the mechanism for establishing exchange rates. That's what we had after WWII and the Bretton Woods conference, and it worked fairly well, from the U.S. perspective anyway, for some time. The problem in the end was that the participating parties, and chiefly the U.S. Central Bank, were not able to maintain the price of gold stable enough to continue the arrangement.
Essentially, the U.S. Central Bank lost control of the price of gold. So while bank notes were being redeemed at 35$/oz by the U.S. Treasury (it was obligated to do so by the Bretton Woods Agreement) gold was selling elsewhere for $45/oz.
It doesn't take a rocket scientist to recognize that this is an unsustainable arrangement.
Going back to any kind of hard asset based currency in a global market seems completely out of the question simply because of the impossibility of maintaining a sufficiently stable price for the asset. Fiat currencies make far more sense in today's world.