Whatchamacallit!

Bloody hell I need a word. I need a word to describe the concept of energy-as-currency.

I made a joke and said "current-cy", obviously that doesn't pass muster.
The problem here is that I'm trying to invent/define what might very well be a new concept. The idea of a global, hard currency, backed by energy, measured in joules and not conflated with the stored form it takes. What the hell do I call it?

One idea I had, after a second's thought, was to steal a made-up word from a work of fiction. Tas. Its supposed be a physical measurement of "mystical force". On the one hand, the underlying concept of an underlying, intangible substance/motivator appeals to me. On the other hand, misappropriating even pseudo-mystical terminology will serve to undermine my credibility. Although, on the third hand (don't ask where I got it, just accept it as fact) the idea of drafting something from the superstitious types seems like simple justice; they certainly feel free to poach from the naturalist side of the fence.

The Greek "dunamis" (Roman spelling) comes to mind. It refers to the concept of "force that can be felt" and is the Greek root of "dyn-, dyna-, -dyne, -dynamic" in English. I need to be careful though. As I've said many times, beginnings are important; if I don't assemble this idea correctly, if I don't plan and define the parts in a coherent, cohesive and comprehensible manner...it mightn't hold together. Someone once said, "Ideas are fragile things. You have to be careful not to let them out too soon, before they're fully ready, or they'll die of exposure. On the other hand, if you build them up right, then the act of declaring them, merely saying them aloud causes them to suddenly seem possible, even inevitable."

So here I am, carefully laying things out, questioning my own thinking and answering those questions. Here I am defining things and looking for the proper words to communicate this idea. Its bloody painful.