I feel in this case the goal is to get to the point where renewable energy is sufficient to build all the requirements for more renewable energy. It's here the subsidies will dissipate. Until then, subsidies for fossil fuels (the largest of them all) and renewables are necessary, and thusly, so is a fiat standard. In the world of a commodity money base layer, it should absorb the value of products and services added to the global economy. Energy however, is required to produce an overabundance of those. I'm with you bitcoin as a mechanism can supercharge renewable growth, appreciating in value with the overabundance it can create. Almost like a circular recycling mechanism.

Too, a world with few dictators (most will statistically be beyond the age of death by next decade) is important, because it reduces disruption and friction, which is costing us all too much. International grids are an incentive aligning tool.