Hm. I used to think I'd know more about that considering my title, but prophecies are still outside my skillset.

[Fortunately Cecil has put Saix into a decent mood, so he decides to comply.]

Money is of no particular value here, and you can 'buy' what you need from most of the stores here without having to actually pay anything. The only exception is the Nostalgia Nook, which takes in items from our worlds and sells them.