Ideally it would be something that would sell NVidia chips (I don't want my NVDA shares losing their value) and suck down lots of power (to keep the nuclear renaissance going.)
Is there some application of fractals we've over-looked? Maybe we could have a cryptocurrency based on solving blocks of electron motility simulations so TSMC researchers could fund a "folding-at-home" style distributed system? I dunno. Just spit-balling here.
An IQ=80 assistant running 24/7/365 at your disposal would mean enormous productivity gains.
Some other themes are fusion or if you still want to bet on Musk pumping abilities , the Tesla humanoid robot. I think Musk lost it tho, the climate change trade has exhausted itself, and he's been the climate change trade guy for a decade, it's hard to shake that image and say "hey! forget about climate change here's a nice robot!"