Money is a commodity, but you don't want it to behave like one. That's where fiat currency comes in. Inflation, or at least the threat of it, prevents hoarding

Money is a commodity, but you don't want it to behave like one. That's where fiat currency comes in. Inflation, or at least the threat of it, prevents hoarding. It has a realistic and useful effect on value in that it makes money decay over time.