Answer:
I am a band that does not perform, sing, or act. What am I?
I cannot be bought, cannot be sold, even if I'm sometimes made of gold. What am I?
Although glory but not at my best. Power will fall to me when the man who made me dies.
I dig out tiny caves and store gold and silver in them. I also build bridges of silver and make crowns of gold. Sooner or later everybody needs my help yet many people are afraid to let me help them.
My head bobs lazily in the sun. You think I'm cute for my face is yellow my hair is white and my body is green.
No matter how little or how much you use me, you change me every month.