Possession of the private key also allows you to create signatures which prove your ownership, while not revealing your private key. Artworks could be encrypted and only decryptable by such signatures. Client applications could be built to incorporate this.
We have a big problem today in that our information technology's ability to infinitely create copies of digital artifacts seemingly breaks the incentive mechanism to create. I.e. art, news, authorship worked better when you could sell physically sell copies of your album, book, painting. This has resulted in a glut of low quality stuff.
Think of the long term. It would be very good for society to solve this problem. With the distribution abilities of the internet, plus the ability to monetize adding incentives to create, we should see much more, and higher quality art. It would enable more of our economy to move online, which would be good for the environment. I.e. humans are mostly interested in social status. Today we show that status by creating and showing off possessions. But also we need jobs. What will people do for work in 2050? Perhaps we'll still be busily working to climb the pile of monkeys, but now with virtual goods. That's more sustainable than the current situation.
For a hacker & technology forum, Hacker News is remarkably negative on crypto topics. Part is a justifiable reaction against the hype. Another part I think is FOMO. But also, the crypto space is only partially about technology. It is very inefficient technology from a functionality point of view. But from an economic point of view, where the problem is coordinating human activity in the way that money does, I think there's a lot of potential there.
At a certain point there is more risk in being a "permabear" than there is in taking a measured interest. The crypto space has been growing for 12 years ... is it really just a giant fraud at this point? No value, nothing of interest at all?