Check this out: <a href="http:&#x2F;&#x2F;filecoin.io&#x2F;" rel="nofollow">http:&#x2F;&#x2F;filecoin.io&#x2F;</a><p>It&#x27;s a cryptocurrency where you have to prove that you are retaining a copy of a file. Whitepaper included.<p>These people are also behind IPFS, the distributed alternative to HTTP (ambitious, huh?)