Muggles have never agreed not to value gold, even though vastly more money exists in non-gold-backed currencies today. Which is why those gold vaults still exist.
On the other hand, the main reason Muggles value gold is for jewelry, and it's more likely that wizards use magic to substitute.
But, again, the fact is that Griphook agrees to convert gold into Galleons at only 5% overhead. So even if a wizard only values Galleons, he'll want to acquire gold and give it to Griphook.
What if the Galleons are actually fake gold created by Goblins, and they can tell 'fake' currency because it's real?
That way, only the Goblins can test for 'real' vs. 'fake' currency because the wizards all have it backwards.
This is a new thread to discuss Eliezer Yudkowsky’s Harry Potter and the Methods of Rationality and anything related to it. This thread is intended for discussing chapter 97. The previous thread is at nearly 500 comments.
There is now a site dedicated to the story at hpmor.com, which is now the place to go to find the authors notes and all sorts of other goodies. AdeleneDawner has kept an archive of Author’s Notes. (This goes up to the notes for chapter 76, and is now not updating. The authors notes from chapter 77 onwards are on hpmor.com.)
The first 5 discussion threads are on the main page under the harry_potter tag. Threads 6 and on (including this one) are in the discussion section using its separate tag system.
Also: 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25.
Spoiler Warning: this thread is full of spoilers. With few exceptions, spoilers for MOR and canon are fair game to post, without warning or rot13. More specifically: