Bitcoin’s supply is controlled by code, not policy. New bitcoins are created through mining at a predictable rate, and that rate is cut in half roughly every four years in an event called the halving.This schedule is enforced by every node on the network. If someone tried to create extra bitcoin, the network would reject it. This is fundamentally different from fiat currencies, where central banks can expand supply during crises or political decisions.

This is why Bitcoin feels less like a policy tool and more like a rule based system.