Answer:
What can you lose that will cause other people to lose theirs too?
I am black and white. I have strings I have keys. I make sound without my lips. I make dough with no flour
In a tunnel of darkness lies a beast of iron. I can only attack when pulled back. What am I?
By Moon or by Sun, I shall be found. Yet, if there's no light around, I am undone. What am I?
What has banks but no money a bed but no sleep waves but no ocean?
No matter how little or how much you use me, you change me every month.