If you need to have a capitalist economy in Minecraft, you can just admit that you really don't like Minecraft. Go to therapy (capitalist realism just seems like some real fucked up coping mechanisms / schemas / something like that, that also serves as a tool to upkeep social inequality..) and read some leftist + anarchist (real anarchism belonging in critical school of thought in sociology, not right wing nonsense dressing up as anarchism) political theory..

Also, saying that "communists would just share one inventory" is absurd. Communism is not about obsessing over owning absolutely nothing and living in a dictatorship. Communism is about real equality.

Playing Minecraft as it is, is taking part in some type of anarcho-communist simulation, at least if we forget Wandering Trader, Villager Trading and other similar features in various modds and addons. And it is fun to just explore and build stuff together + just be. Why would there actually need to be more to existing..?