And we should ignore that it has historically been a store of value for thousands of years?
Art doesn't tend to be a good thing to invest in for returns - some artworks become more culturally significant and appreciate, while others fall into obscurity and irrelevance as their style falls out of fashion (see: Damien Hurst). Insurance, sale fees e.t.c. further cut into any kind of return.
What's your point? Art is valuable thus crypto is valuable? I don't think one follows the other.
My point is that, if you break the individual elements that contribute to the value of art, and think about why billionaires buy and sell art, then a lot of those first principles for why value exists, can also be applied to crypto (e.g. scarcity, ease of exchange relative to holding gold at least, a sense of value that isn't tied to practical applications, etc.). And in fact, trading pieces of art around and dealing with physical custody and preservation and forgeries/authenticity and "provenance", just seems to be like an inefficient/clunky physical world blockchain with extra steps and ineffective tokens, if you ask me. So really my point is just that, crypto having some inherent value beyond just tulip mania/pump and dump/greater fool/etc., maybe isn't so weird at all.
I agree that this is a use case but due to BitCoin's extreme volatility it is not really good for that either. Any stable coin is much better suited for this.
Bitcoin started with essentially novelty and "collectibles" value, like baseball cards or celebrity signatures or fine art pieces, but doesn't depend on shifting interests or demand to justify its underlying technical/foundational values of decentralized trust.
The comparison to digital gold is apt, especially if you don't stumble on the red herring that gold has physical industrial/commercial applications beyond just being shiny-and-rare-and-has-history. But, physical gold has pitfalls too: https://asia.nikkei.com/Spotlight/Caixin/Mystery-of-2bn-of-l....
What is the economic value of being able to 100% prove via battle-tested cryptography, that you own the asset that you say you do? What is the value of the technology behind being able to do that? The token's value is simply a proxy for the technology. Bitcoin being a store of value doesn't mean that, a bunch of idiots keep convincing each other that it's more and more valuable; it really means that, the global economy recognizes that they'd rather have provable ownership over X amount of bitcoin, then some equivalent $Y amount of fiat.