>"To me, the only purpose of it is to make money."

Understandable, but a wide variety of things exist for the sole purpose of making money. That fact doesn't invalidate cryptocurrency. Without launching into the tried and true "what is money" pontification that crypto advocates usually bring up, it does have use cases for many people and even if those use cases are only valid when they interact with other crypto true-believers, it still has utility for those folks nonetheless.