I guess I hadn't considered that not all currencies need to move every turn (which would stop the game flowing), so what you're saying sounds like it should work, yes.
I very much doubt this game idea will be developed unless somebody else likes and wants to use it (or part of it), as I have lots of software development ideas that I'm better able to implement, but I do like board games.
I hadn't seen thegamecrafter.com, it looks useful. The 3D printing of tokens might also be cost effective for a game prototype. I've done some of that in the past, using https://www.tinkercad.com/ for designing things quickly.
As one you recently spent around 12 hours (following a failed digital initiative) churning out a respectable tabletop game using nothing more than paper (& MS word ) & whatever bits I had in my bits case (I'm a little serious - but symbolic standins work at this level), I can tell you that you don't need TGC for the first prototypes. :c)
Tinkercad looks interesting. Thanks for sharing. :c)