.... actually it is even worse than that. Shock implies surprises, but energy production is predictably going to dee upheavals.  - it is the one sector of the economy guaranteed to experience technological changes. I dont know how we will be producing electrons in 2032, nor what they will cost, and neither does anyone else. -

 I can list half-a-dozen highly plausible optinons for future generation mixes and technologies off the top of my head - some of them are unavoidably moderately more expensive than unmitigated coal, and some of them are ridiculusly cheap. Either of which would completely wreck any currency based off the supply of power. Bad, bad, bad idea.