Answer:
I am very afraid of doing scary activities.
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.
I can be written, I can be spoken, I can be exposed, I can be broken. What am I?
If I drink I die. If I eat I am fine. What am I?
I walk on 4 legs in the morning 2 legs at noon and 3 legs at night.
A doctor might remove one from the neck of a Dracula victim.