This is governed by which specific cryptocurrency's monetary policy you're talking about. For example ethereum's supply is decided by a committee with people fr

This is governed by which specific cryptocurrency's monetary policy you're talking about. For example ethereum's supply is decided by a committee with people from different groups [1], while bitcoin's is basically fixed incremental supply that's built into the protocol (as of writing this comment). [1] https://docs.ethhub.io/ethereum-basics/monetary-policy/ https://docs.ethhub.io/ethereum-basics/monetary-policy/