Answer:
I can be quick and then I'm deadly, I am a rock, shell and bone medley. If I was made into a man, I'd make people dream, I gather in my millions By ocean, sea and stream.
What does no man want, yet no man want to lose?
Not born, but from a Mother's body drawn. I hang until half of me is gone. I sleep in a cave until I grow old. Then valued for my hardened gold.
What travels from house to house and is sometimes narrow and sometimes wide but always stays outside?
What goes in the water red, and comes out black?
People take me on walks and I run and have fun. What am I?