Demurrage (currency)

Demurrage is a cost associated with keeping or holding onto a certain kind of currency or money. It's like a fee or tax for keeping or storing the money. Imagine if you were given a bunch of coins to hold onto, but you had to put the coins in a jar. Whenever the jar gets too full, you need to take some coins out or you will have to pay a fee. That fee is like demurrage. Some currencies work this way so that people don't just store the currency and never use it.