speaking of game currencies at one point (10+ years ago) i was prototyping a browser MMO where you ride around space in giant cosmic creatures you tamed. for the most part the player race was humanoid but with some hinted-at avian ancestry, which means you’d shed some feather-like material every day - and because the supply of these feathers (my design docs from back then refer to them as “shiny little tags”) was slow but steady and scaled with population they just used that as currency. that’s them in the top-left:
lore-wise you’d come across wealthy NPCs who stopped bothering to collect theirs and would instead grow these dense natural feather coats as a status symbol. i think you generated 1*your level with each daily login? it was based on the idea of taking “time is money” literally but i don’t know if it’d make sense as a game economy. also maybe a little gross in retrospect. they were called chronons
