There is the web3 and Web 3.0 (as a successor for Web 2.0), one more oriented to distributed and federated content, another with everything on top of a currency, so every stored bit costs some gas.
And although I don’t dislike the good parts of cryptocurrency, being the cryptography behind it and the potential of decentralized power behind it, I’m not too fond of the interests it brings. Since it’s designed from the core for monetary value, it attracts people aiming for the best Return on investment not caring for the environment (there is a debate about green energies by 2022).
I know that a Hobbyist net, an Indieweb, and a Hyper profitable net are going to be different between them, their core values are different, and there is a space for all of them.
I don’t think Web3 is going to be self-sustainable since there is no balance between losers and winners.