Maybe someday some clever smart contract thing will really take off; and maybe someday some non-PoW coin will really matter, and maybe one day all the stabilizing regulatory infrastructure will be replicated for that hypothetical coin. It could happen. But it hasn't happened yet; so far it looks more like a ponzi scheme. And even if the tech really does evolve into something truly valuable, the route to that promised land could still have some surprising ups and downs, and if coins really continue growing, real-world economic pains along the way. Also - the tech behind it all isn't the same thing as the specific instantiation of todays coins. Even if the tech finds a niche, todays coins could still turn out to be a ponzi scheme.
If I were to say that Coinbase and Uniswap have a clear value prop but AI doesn't, it also wouldn't make much sense as I'm not comparing apples to apples.
E.g. HN is known for being anti-crypto but suspects anyone pro crypto to be a crypto-invested shill.
But then at the same time I think it must be considered that e.g. anyone being anti-crypto also has a stake or interest in non-crypto related endeavors. I doubt there are people on here without some form of stake simply arguing for "the universal truth".
Over the long term, protocols outcompete hosted services. E.g. Automated market makers will be much longer around than any centralized exchange like e.g. Coinbase.
The exact opposite happened with email