Answer:
No matter how little or how much you use me, you change me every month.
A tree with 5 branches, no leaves and no fruits
Not born, but from a Mother's body drawn. I hang until half of me is gone. I sleep in a cave until I grow old. Then valued for my hardened gold.
What has roots that nobody sees, and is taller than trees. Up, up it goes, and yet it never grows.
This is in a realm of true and in a realm false, but you experience me as you turn and toss.
The more of me you take, the more I appear behind you. What am I?