The fiat money supply is a function of addition and multiplication, and is increased not to accommodate a growing economy, but rather almost exclusively because it a debt based monetary instrument.

Because there are no physical, technical, or mechanical constraints to the supply of fiat currency, its supply will perpetually increase due to the borrowing required as a result of its devaluation over time and the associated interest. It’s a complete doom loop.

#bitcoin is simply a function of division, as it is fixed in supply (constrained by the network rules). As an economy grows and requires a more precise coincidence of scales, the #btc unit is divided to accommodate the exchange of goods and services for #bitcoin.

As long as a monetary good is reasonably and easily divisible, any fixed quantity of that money can serve any economy of any size and complexity.