The penny disappeared because one cent became too economically insignificant to manufacture.

The nickel shows this was not an isolated problem.

In fiscal 2025, it cost the U.S. Mint:

• 3.02 cents to produce a penny
• 13.31 cents to produce a nickel
• 6.77 cents to produce a dime
• 14.53 cents to produce a quarter
• 27.81 cents to produce a half-dollar

The dividing line is clear.

The penny and nickel lose money.

Every larger coin still returns more than it costs.

Paper currency tells the other half of the story. The variable cost of printing a note ranged from roughly 4 cents for a $1 bill to 11 cents for a $100 bill.

And $100 bills now represent roughly 83% of the total value of U.S. paper currency in circulation.

So physical money is not simply disappearing.

It is being hollowed out at the bottom and concentrated at the top.

The smallest denominations become too economically trivial to manufacture, while the largest remain extraordinarily efficient stores of dollar value.

Bitcoin uses different architecture.

One bitcoin can hold substantial value or be divided into 100 million satoshis without requiring a separate physical object for every denomination.

Fiat eventually retires the unit because its purchasing power became too small.

Bitcoin keeps the supply rule fixed and lets the unit become smaller.