when you weren't looking a kobold has snuck into your backpack and is now eating your gold pieces
there is a small notification in the corner of your screen that says "-1 gold" and it ticks up by 1 every 4 seconds
opening your backpack pauses this notification as the kobold stares innocently into the distance
when you close the backpack the notification appears again
im picking up the kobold by the scruff of the neck like a misbehaving kitten