Bitcoin the currency is a different beast. Well if you have to rope the value of money to something - computational power is not the worst thing possible in an increasingly. digital world
Why do you want to rope the value of money to something else than trust ? I know this is low tech and very old but a trust based system can work even for the digital economy. Of course to work properly a trust based system need some conditions which are not met today : transparency and dissuasive sanctions if someone cheat.
I think we need to upgrade our financial system but we need more transparency not more opacity.
The problem with trust based systems is that trust is a fickle thing. If it was up to me I would peg a currency to the kWh. It will create dynamic equilibrium because it will be constantly consumed to create GDP.