Answer:
I am as hard as metal, yet as flimsy as glass. I shine like a star, yet I am only a rock. What am I?
I am free the first time and second time but the third time is going to cost you money.
What can travel all around the world without leaving its corner?
I mirror your actions.
I cannot be bought cannot be sold even if Iām sometimes made of gold.
No matter how little or how much you use me, you change me every month.