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I too don't need any of the features that cryptocurrency brings. However, cryptocurrencies are making substantial headway on solving the hardest class of problems that humans face: coordination problems. Common examples include the Tragedy of the Commons and collusion [1].

Vitalik has written some surprisingly approachable pieces on the various problems that cryptocurrencies face. It's not too much of a leap to see how these problems appear in non-cryptocurrency contexts. The value I see in cryptocurrencies is that they must develop robust/antifragile solutions to the coordination problems that have plagued society forever. Even if some problems can't be solved, then there are mental tools for making sense of what's going on.

[1]: https://vitalik.ca/general/2019/04/03/collusion.html [2]: https://vitalik.ca/general/2020/08/20/trust.html