Coin tokens are provided for this. They're not element-constrained; players could use a substitute whenever they operate out. A similar tokens are furnished in Dominion: Seaside On my list of achievable future mechanical themes, "tokens" was the simplest-sounding, so I went with that. There are actually a bunch of https://financefeeds.com/moomoos-global-paper-trading-challenge-to-start-on-october-14th/