Answer:
You use me from your head to your toes. The more I work, the thinner I grow. What am I?
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.
One pace to the north. Two paces to the east. Two paces to the south. Two paces to the west. One pace to the north.
What is easy to get into but hard to get out of?
I get paid to shoot people then blow them up.
Whoever made me don't want me. Whoever bought me don't need me. Whoever use me don't know me.