GNOME is pretty but KDE works.

“Works” as in does what I expect from a desktop without deciding over my head that I should rethink my forty years of accumulated desktop experience without any discernible benefit to it.

In theory in a perfect world without scams or mistakes it could be useful but then again why would you need it in a perfect world.

I’d say in theory it could be used something like public records of proof for ownership of immaterial or intellectual property and the transfer thereof. Say the rights to music, writing, digital art and whatnot. Like the essence of NFT without the hyped up crypto bro speculation and pump’n’dump.

The difficulty would be to get it recognized as legally valid and the bigger difficulty that as there is no central authority there is also nobody being able to rectify fraud or user mistakes. If you implement central authority it’s basically just any old list of transactions with some extra crud so then the question would be why even bother.