Don't take out your Coin Pouch in front of Goblin Dragons; they're obsessed with Gold. They like to collect shiny things around your Island, go off on their own, and bury it in secret. If you ever make the mistake of giving them a coin, they'll hound you every time you pass by, digging at your pockets for more.
Goblin Dragons don't just love Gold; really it's anything shiny. Jewels, Gems, crafting materials - if it's valuable, Goblin Dragons will snatch it from you the first chance they get.
Once Goblin Dragons reach adulthood, they're more lenient about parting with treasures in their trove. However, you can't have anything for free; you'll need trade them some food, jewels, or other prized possessions.
Epic Goblin Dragons are intimidating creatures with hulking forearms and mischievous grins permanently plastered on their faces. Back when Dragons were domesticated by men, gangsters used to take Epic Goblin Dragons along when trying to collect money from their collection rackets. The dragons were great at collecting the money, but not too keen to hand it over to the mobsters.