Doug Rushkoff had a talk where he called out local currency as a thing heβd like to bring back from the medieval.
Exclusive to the community, and only valid for a short period of time, so you canβt hoard it or siphon the wealth to another community.
Edit:
Found a blog post about it: https://archive.rushkoff.com/articles/local-money.html
It doesn't say anything about it being temporary, although he does mention that in his talk here: https://www.youtube.com/watch?v=rRWzOdUiqQE