It's a new, and potentially very lucrative, technology. Given time the cost will go down, not up. The way that will happen is increased efficiency.
Do I know HOW that will happen? No, but I know that it will. It always has, and there are huge motivations for making it happen.
https://www.dpg-physik.de/veroeffentlichungen/publikationen/...
I've seen a few dim-bulbs or sales-types on social media say things of that sort, but never a serious adult.
Everything about the data centre buildout is a bet on the singularity, that's the whole operating premise behind what all AI researchers are doing. The most grandiose charlatans of silicon valley talk about that stuff and everyone else has got in line whether or not they believe it. Trillions of dollars have spent on bringing about AGI. If it doesn't usher in AGI (and it won't) then it's all a catastrophically stupid thing to do.