>Why do you believe this has any relevance at all? People want to buy stuff, not exchange bill with serial number #abcxyz with stuff.

Because it solves the double spend problem [0] associated with digital currency without use of a centralized database.

I think that matters to people trying to avoid onerous capital controls or a government printing 31% of the money supply in a week [1]

[0]: https://en.wikipedia.org/wiki/Double-spending

[1]: https://www.bloomberg.com/news/articles/2019-02-05/venezuela...