Cryptography is the basis of Web 3.0, so in a formal sense there is none.
But I think that you rather want an example that is a little farther away from finance markets. Consider, for example, the (in my observation mostly dead) Namecoin:
> https://en.wikipedia.org/wiki/Namecoin
which attempts/attempted to implement domain names via a blockchain and is sometimes considered a precursor to NFTs.
Cryptography is the basis of Web 3.0, so in a formal sense there is none.
But I think that you rather want an example that is a little farther away from finance markets. Consider, for example, the (in my observation mostly dead) Namecoin:
> https://en.wikipedia.org/wiki/Namecoin
which attempts/attempted to implement domain names via a blockchain and is sometimes considered a precursor to NFTs.