Answer:
I am easy to waste. I am unstoppable. What am I?
I have a mouth on my head and eat everything.
I will disappear every time you say my name.
I will go within you and destroy you. Only because you wanted me too
I wiggle and cannot see; sometimes underground and sometimes on a tree. I really don't want to be on a hook and I become a person when combined with “book”.
It flows out of the soil, It burns you if it boils, And holds us in its coils, More valuable than gold, As black as it is old.