"Get a massive amount of Bits by selling this unit."
Gold Duck is a selling material (XL) that can be sold for 20,000 Bits each.
How do I get this?[]
Gold Duck, like other Coin Type ducks, can be earned in [Weekend Only] Gold Casino quest that's active during weekends. You can get them by completing the [Hard] Gold Casino quest.
You can also farm this unit in the locked quest [Locked] Bits / Solo's Expert: No hearts-High Roller.