Even if every society adopted a cryptocurrency with a mining system like bitcoin, watt-hours would essentially become a de-facto world 'currency'. How would that even work? Watt-hours would always have to be more expensive than the amount of cryptocurrency that they could produce, otherwise a power company would be better off simply 'printing' money.
edit: The more I think about this, the worse it gets. Rapidly mining currency would deflate the currency. For one, this means that the base cost of electricity will constantly be increasing. For two, as the mining gets more difficult, you need to use more electricity to mine. The cost would have to fight both the increase from mining and deflation at once. This would be a nightmare - especially for the poor.
With some more explanations:
If everyone were using cryptocurrency, they would all be tied to how much electricity it uses to generate the currency. The value of the currency would then be directly tied to watt-hours.
The cost of electricity would be in bitcoins. The cost of electricity would always have to be more than a bitcoin is worth, or power companies would have no reason to sell the power.
It sounds like he's arguing from the "Mining determines price" point, which is wrong, since we know mining follows price, and price is just a function of supply/demand on the free market. But either I can't wrap my head around it, or I can't explain this to him correctly. Please help?
He's right that it would be more advantageous for the power company to 'print' money up to a certain point.
But he doesn't seem to understand that there's a limit of roughly 150 BTC that can be 'printed' each hour (that will halve to roughly 75 BTC in a couple years). The more people using watt-hours to get at that pool of 150 BTC, the fewer BTC you get per watt-hour. (If the number of BTC mined scaled linearly with the number of watt-hours expended, he would be completely correct, by the way.)
If it's cheaper for the power company to mine BTC than buy them, OK, they do that until the difficulty makes it no more advantageous to mine BTC than sell electricity and buy BTC with the proceeds.
Then what? Then nothing. Equilibrium is reached and everyone is happy.
If the cost of BTC was truly determined by the cost of the watt-hours producing them, then BTC is currently magically overpriced.