As an example, in Ark, people use cementing paste as a currency. It's very time-intensive to make, stacks a lot, is not terribly heavy, and high-level crafting

As an example, in Ark, people use cementing paste as a currency. It's very time-intensive to make, stacks a lot, is not terribly heavy, and high-level crafting and building needs it in solar-mass-esque quantities.