My gold display is missing. Reloading the game did not fix it. I see obols, pandemonium fragments, and artificer stones only.
You are only allowed to display 3 currencies at the bottom of the character window. It sounds like you currently have Obols, Pandemonium Fragments, and Artificer Stones selected.
To see gold once again, you’ll need to unselect one of those currencies in the left pane of the character window. Afterwards, you can select gold to show once again.