I'm working on decentralization, which I think is a very socially important goal. The cloud is not my ultimate objective, but it's one of the very few short term use cases I see where a decentralized system seems to have the potential to utterly dominate a centralized one.
Decentralized tech is very new. It's very hopium, and it's very poorly understood, both by zealots and by non-believers. I think that decentralization is going to change a lot of things in fundamental ways, and I think I can move the field forward faster by building a tangible, provably working, provably superior use case for decentralized tech.
Cloud storage is not as glamorous as starting a new world order, but the most important engineering is often the most mundane. People probably felt similarly about the Internet back before the world wide web was invented.
Edit: I think decentralization is great (like say IPFS), but I would not risk health or put off others to dedicate all my time to working on it, social interaction is an everyday need!
What part of that stack are you working on? Blockchain currency, low level networking, distributed filesystems, p2p websites, ...