sure, i have miss, however, i think that's better than nowadays, or any other previously tried one.
Banks are backing my opinion, as they are buying like hell nowadays, last 1-2 years. Must be several reasons behind that. I guess nobody wants to go back to the middle ages and use salt as a currency again. Nothing else left, only precious metals, if we look for some valuable, well-known physical asset, what can be used as a currency.
And once again, I think physical form of currency can't disappear. People won't accept. However, get rid of printers, and the printers' owners, I would pretty much agree.