How to explain what is cryptocurrency to someone who doesn’t even use internet

You could explain blockchain like this:
Imagine you are playing Monopoly, but instead of using Monopoly money, everyone keeps track of everyone's money flow.
Then, let's say every 5 minutes you compare notes, and if someone's note is different, that player is kicked from the game for cheating.
But if there are no "corrupt" players in the game, we can keep playing the game, knowing that transactions are valid.
In this case, cryptocurrency is a money in the game we are playing.
That's bast I can do 😓