What money is — and why cash quietly loses value

A $100 bill costs a few cents to print. It is worth $100 only because everyone agrees it is — and because the state accepts it for taxes. That is what fiat money means: money by decree, not backed by gold or anything physical.

What good money needs

Over centuries, many things have served as money — shells, salt, silver, gold, paper, and now digital entries. The ones that lasted shared a few properties:

• Scarce — new supply cannot be created at will. This is the most important one.
• Durable, divisible and portable — it does not rot, can be split into small units and moved easily.
• Fungible — every unit is the same as every other.
• Widely accepted — people trust they can spend it tomorrow.

Today's currencies score very well on everything except the first point. Central banks and commercial banks can expand the money supply, and over long periods they do.

Purchasing power: the number that matters

What counts is not how many dollars or euros you have, but what they buy. When the amount of money grows faster than the goods and services it chases, prices rise — that is inflation. A dollar in 1990 bought roughly two and a half times what it buys today.

At 3% inflation, cash loses about half its purchasing power in 23 years. At 5%, it takes only 14. Nothing dramatic happens on any single day — which is why it is so easy to ignore.

What this means for you

• Cash is for spending and emergencies, not for long-term wealth. A reserve of a few months of expenses is sensible; decades of savings in cash are not.
• Long-term wealth has to be held in assets that can grow faster than inflation: businesses (shares), and to a degree real assets such as gold or property.
• Assets carry their own risk — they fall, sometimes a lot. The answer is not to avoid them, but to hold them with a process that manages that risk.

Next: inflation — the invisible tax on savings.

By Dr. Harry Hamann · 5 min read