Answer:
I am the fountain from which no one can drink. For many I am considered a necessary link. Like gold to all I am sought for, but my continued death brings wealth for all to want more.
I grow where no flower grows, where no light touches the walls, up or down, that I don't care, was here before people were.
A nut cracker up in a tree.
What can be big, white, dirty and wicked?
The itsy bitsy teeny weeny yellow polka dot variety is quite popular.
I touch the Earth, I touch the sky, but if I touch you, you’ll likely die. What am I?