I think it was a novel idea, but the infrastructure does not exist for it to be commonly used in commercial transactions, and it has behaved more like a security than a currency. It has also opened the door to CBDCs. honestly, I think the real value of the blockchain is in its potential to serve as a way to make documents (wills, deeds, etc.) basically tamperproof.
I would like to disagree with "infrastructure" does not exist. Bitcoin is still work in progress and we are already seeing layer 2 solutions like lightning network, strike, etc. It also provides us people with an option to opt out of fiat standard at will but thats a different argument. I agree with it's potential to serve as a proof of ownership of stuff, hence why we have NFTS. BUT, Bitcoin = money Other blockchains = defi, nfts etc.