A little money sack
For random money drops, a little money sack appears instead of a gold coin. Maybe 2-5 gold.
Totally 8bit, and like the classic side scrolling games dropping loot.
It could be easy to code in anything inside the money sack. Like random weapon drops later on as well.
good idea with the robber racoons:D
Thanatos Hades commented
Introduce a new mob called Robber Racoons. Those would be perfect for dropping money bags.