The goblins may only use that to check for Muggle currency that wizards try to turn in to the goblins. They may also have methods that just track objects transfigured to look like Muggle money. If goblins have similar cognitive flaws as humans, then they might be able to keep track of the economy for this one very specific purpose and not even realize that arbitrage was really a useful practice.
The goblins may only use that to check for Muggle currency that wizards try to turn in to the goblins. They may also have methods that just track objects transfigured to look like Muggle money. If goblins have similar cognitive flaws as humans, then they might be able to keep track of the economy for this one very specific purpose and not even realize that arbitrage was really a useful practice.
That seems plausible.