Either its near-impossible to fake up galleons, or the threat of goblin war against counterfeiters is too scary for people to try.
I think you’re onto something. Specifically, in the books, Goblins possess magic metalworking techniques wizards don’t know how to duplicate—and they know how to detect them. (It’s a point of contention as part of the whole “give us wands” thing.)
I think you’re onto something. Specifically, in the books, Goblins possess magic metalworking techniques wizards don’t know how to duplicate—and they know how to detect them. (It’s a point of contention as part of the whole “give us wands” thing.)