> _“I can’t find a #blockchain application whose value has anything to do with the blockchain part, that wouldn’t be made safer, more secure, more reliable, and just plain better by removing the blockchain part. […] Someone, please show me an application where blockchain is essential. That is, a problem that could not have been solved without blockchain that can now be solved with it.”_
— [Post](https://www.schneier.com/blog/archives/2022/06/on-the-dangers-of-cryptocurrencies-and-the-uselessness-of-blockchain.html) by #BruceSchneier
I mostly agree with this critique of #crypto, but…
🧵
I do think there _are_ use cases for public, decentralised blockchains _today_: those having to do with **moving #wealth across time, across space or between people, in an ethical way, when unjust laws prevent people from doing so, or when the other mechanisms are too inefficient or burdensome**:
* Someone saving for their retirement storing BTC in a cold wallet to avoid bank fees, fiat devaluation, frozen deposits, expropriation.
* Economic migrants sending back home part of their good fortune in XMR to avoid putting their relatives at risk or arbitrary fees or delays.
* Refugees, activists or dissidents for whom the only way to keep some property theirs is to memorise a private key before crossing a border or entering jail.
* Supporters of rightful protesters or other causes (eg, the Canadian truckers) who due to abusive laws can only send them criptocurrency.
(Still, a problem with that: you have to hold certain political positions for those use cases to look “legitimate”.
For example: you have to find unjust what the Canadian government did to economically suffocate the protests of the truckers. Or you have to agree that it's justified for law-abiding citizens to do whatever they can to prevent the State from seizing their assets.
I am more or less there, and so I see blockchains as a benign tool for all that.
I'm not saying one has to be a hard-core libertarian. But a dash of individualism and scepticism towards States is necessary to see the merits of blockchains today.)
I _think_ there will be other legitimate use cases sometime in the future.
For instance, notaries and other public institutions are very slow and expensive ways to keep track of property and of voluntary agreements. Blockchains might help there. On the other hand, we don't want everybody to know who owns every single vehicle, apartment or plot of land, and non-reversible transactions sounds like a dangerous idea when one's spending their life savings on a house. So it's unclear.