Limited supply

When the amount of money grows faster than the amount of goods and services, prices tend to rise. It isn't that things become 'more expensive' in themselves — it's often that each unit of money becomes worth less. Anyone saving in cash quietly loses purchasing power, year after year.

The problem isn't that money is sometimes created, but that there's no limit. As long as the amount can be increased, there's always a temptation to solve short-term problems by diluting what everyone already owns.

Bitcoin's 21 million are released on a schedule known from the start. New bitcoin are created as a reward to those who secure the network, and that reward halves roughly every four years. Today around 20 million are already issued; the very last ones aren't created until around the year 2140.

What matters is that the rules apply equally to everyone and can't be changed by a single actor. Changing the cap would require an overwhelming majority of the network to voluntarily agree to make their own bitcoin less scarce — something no one would rationally want.

Money with a known, limited supply rewards patience. When you know what you save can't be diluted, it becomes easier to think long term, plan and build. Historically, societies with stable, hard money have found it easier to save and invest across generations.

A predictable supply is also fairer: no group gets a quiet advantage from standing closest to the money tap. Everyone works with the same rules.