I think this is a decent response but it's not completely fair.
It was obvious to me that when Google came out, it was a game changer. It wasn't obvious to everyone and I remember at least one article talking about how Google wasn't really search because it could only find what other people liked and couldn't actually understand the things it was searching (the article was old, I can't find it, sorry).
EBay was a front end for Beanie Baby sales before it became legitimate.
Yahoo before Google, much like the rest of the search engines like AltaVista, was a cesspool of irrelevant links to porn.
Amazon was great for books but being the "Sears of the internet" was a laughable idea until it wasn't.
As an aside, it was obvious to me that Wikipedia was also a game changer. I remember having many conversations with people thinking that an online encyclopedia would degrade into a radioactive comment forum with anyone and everyone saying whatever it is that they wanted, without any relation to reality.
I agree that cryptocurrency has been around for a while with not a lot of use cases to show for it but I also want to point out that until "Web 2.0" came around, the internet and online services were still very niche. It wasn't until social networking took off that it became widely adopted. It wasn't until smart phones existed and became cheap enough that everyone took the internet for granted.
You're using metrics from a previous iteration and imposing them on a new technology. Maybe it's appropriate but, in my view, it's tone deaf to what the underlying technology is.
Cryptocurrencies are, in my opinion, more akin to the early days internet infrastructure. It's lower level foundational technology that can be used for applications to be built on top of.
As a fundamental technology, it is getting widespread adoption, as can be seen by the volume and value. Real world people are using it to exchange money. We can argue about what percentage of that money is "valid" and for what purpose, but it is being used.
Again, in my opinion, we're seeing the growing pains of a new technology that has potential but hasn't been widely adopted. People have funds that are hard to move out of the cryptocurrency space so any outlet for spending within the system, like with NFTs, gets amplified.
EBay was a front end for Beanie Baby sales and the same arguments levied against cryptocurrencies could have been levied against EBay (and I suspect they almost surely were). Telling people you would order toilet paper online was laughable in 2000 and considered hype, just as saying you could order toilet paper without a bank account now.
I don't have a crystal ball, I don't know what the future holds but the visceral hate that I see against cryptocurrencies seems more rooted in emotion than in reality. I saw the same hate for start-ups mid 2000s. I'm advocating for circumspection.