Too further make the point. Consider all the gold we have today like a large pizza as well. But there is a huge unknown amount of gold in the earth. As well as gold on other planets and asteroids.

Well, each of those are like adding another pizza to the party. Now you have 100 large pizzas. That is inflation.

Same with fiat money. Except a new pizza can be made and have zero cost to make. That means those in control of the pizza control the world.