Inflation, that's the big problem with fiat currency today as goods and services keep getting more expensive is because currency buying power becomes less and less. This is why I choose to keep a portion of my savings in gold and silver. They preserve buying power.
In 2014 Canada demonetized the 1 Cent coin, now my politicians are planning to eliminate the 5 Cent coin.
Here's another old banknote you might find familiar...
Other side...