Answer:
Where do fish keep their money?
I start in little but I end in full you'll find me in half and complete.
I am taken from a mine and shut in a wooden case from which I am never released. Yet I am used by almost everybody. What am I?
Many people own a copy of me. Without me the world would fall.
What loses its head in the morning but gets it back at night?
I flow from the Homerβs mouth when he sees doughnuts.