We know about at least one Gringotts in the world, the one in Diagon Alley.There is possibly one in Egypt as Bill Weasley work as a Gringotts curse-breaker there. Apart from Bill's job,is there any other evidence that other Gringotts exist throughout the world.In Harry Potter and the Philosopher's Stone, Hagrid says that Gringotts is the only place to store your gold.He may mean in the UK or in the whole world.
I wonder if the Gringotts in Diagon Alley is the only Gringotts in the entire world?