Gold plays an important role in Gravity Falls. We can't be sure what is going on, but here are some evidence and theories.
In Tourist Trapped, Dipper pretends to be reading Gold Chains for Old Men Magazine.
Stan and Sheriff Blubs, both of whom are or could be old men, wear gold necklaces.
In Boyz Crazy, Stan stocks up on meat and gold for the apocalypse.
In Dreamscaperers, Bill tells Gideon to buy gold. Some say it protects you from him, but then why would Bill tell you to buy it?
