Coins become worn because they are used a lot. Every time you put them in your pocket, drop them on the floor, or slide them through a vending machine, they get bumped and scratched, just like when you wear out your shoes by walking a lot.
Examples
- A penny you drop on the floor many times becomes duller over time.
- Putting coins in your piggy bank can make them look less shiny after a while.
- Coins that get stuck in a vending machine may come out with dents.
See also
- Why Do Prices Go Up So Much When There's a Shortage?
- What Makes a Coin Flip Fair?
- Why Do We Use Money Instead of Bartering?
- Why Do We Have Different Kinds of Coins?
- Why Do We Have Different Kinds of Taxes?