I’ve been thinking more about this idea since your recent podcast. Would it be possible to create a fully open source Uber (or some useful subset of Uber) identity and payments is already solved with nostr bitcoin. I think the hardest part would be maps, then some kind of decentralized dispatcher service. But with those 4 things it could work. Then you could use that effort to create open Airbnb, etc.

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Yes, it’s absolutely possible. The biggest piece of building a solution is a distributed reputation and identity system, which is what #Nostr essentially is. The frustration is that trust rankings have to be built slowly, and also require explicit “trust network” sorts of tools which are incredibly nascent right now. I would look toward Satlantis for how they are implementing the idea of trust weighted connections and web filtering.

In addition to Satlantis, I'd recommend you look into nostr:npub1u5njm6g5h5cpw4wy8xugu62e5s7f6fnysv0sj0z3a8rengt2zqhsxrldq3 's influence score and subjective, contextual, transitive trust.