Have you heard of IPFS?  That was a project I was interested in for a while, with the idea of an address space based on content rather than server.  (You search for the hash of a piece of data and anyone hosting that data can serve it to you.)

They have a coin associated with it, Filecoin I believe.  

But I haven't really kept up with it.  I just thought the idea was interesting.

SimpleStacker

tech

The Disappearance of an Internet Domain

In the past was a very interesting fork of bitcoin named Namecoin (NMC). It was also merged mined together with BTC. It was a promise of decentralized domain names.
https://en.wikipedia.org/wiki/Namecoin
https://www.namecoin.org/docs/faq/

But unfortunately the project died. Now is just a shitcoin.
But for a truly decentralized system, we need a full IPv6 standard.