Good Riddles

Question: I dig out tiny caves, and store gold and silver in them. I also build bridges of silver and make crowns of gold. They are the smallest you could imagine. Sooner or later everybody needs my help, yet many people are afraid to let me help them. Who am I?

Question: To get to the word SCARY to ALONE, changing only one letter at a time to make 8 different words including SCARY and ALONE.

Question: Under pressure is the only way I work,
and by myself is the only way I'm hurt.

What am I?

Question: Which eight-letter word still remains a word after removing each letter from it?

Question: What has a face and two hands?