What is the most expensive money in Harry Potter?
I'm curious about the currency in the Harry Potter universe. Specifically, I want to know which form of money is considered the most valuable or expensive in that magical world.
What is the most expensive money?
I'm curious about the value of money and would like to know which currency or note is considered the most expensive in the world. Is it based on its face value, rarity, or maybe even its historical significance?