Last night's PBS Newshour had a bitcoin segment
where it says, in part (search that web page for "Austria" to find the quote and its fuller context),
Worldwide, the energy footprint of Bitcoin alone is expected to double by year’s end, devouring an incredible half-a-percent or more of the world’s electricity, as much as all of Austria.
I'd imagine that electricity cost must eventually get passed through via transaction fees. But, although I haven't "done the math", half-a-percent of the entire world's electricity must correspond to an incredible fortune in any currency. At first blush (i.e., without "doing the math"), the cost-per-transaction would seem enormous. So, how do you "amortize" the cost of half-a-percent of the entire world's electricity among bitcoin transactions?