No, I'm not going to sell you on the 42069th cryptocurrency (thank goodness!), I just think that focusing on crypto, and, god forbid, NFTs, completely wastes the potential that blockchains have. Case-in-point: DNS. The centralization of DNS has been a disaster for the internet. The solution: Decentralize DNS with a free register-deregister system. As DNS is now decentralized, hosting fees will decrease dramatically. Laws will also need to be made to prevent DNS-scalping, so as to prevent people from sitting on domains and selling them for high prices. This might be resolved through either domain limiting or traffic tests, where a domain must keep a minimum amount of traffic over time in order to justify it staying registered. Otherwise, it would get deregistered and become freely up for grabs.
And that .i2p addressbook can get you free vanity domains. You can just provide links like TheFreePenguinGuy.i2p/?i2paddresshelper=[your .b32.i2p address here]. Or, you can find one of the gazillion i2p address books out there, and connect that vanity to the .b32.i2p address for free.
You can also generate .onions with some pattern, using tools like oniongen-rs or oniongen-go or mkp244o.