I disagree completely. The electricity expended on Proof of Work is a sunk cost that 'charges the value battery' of every bitcoin.
bitcoin_value = electricity ( cryptographic signatures + network trust )
Compare that to something like, a dollar, (which you use to pay for turning your drier on) ...
dollar_value = (gdp - entitlements + taxes) / corruption
RE: Bitcoin uses a hell of a lot of power!