Answer:
Many people own a copy of me. Without me the world would fall.
I must be broken before you can use me.
The more you have of it the less you see. What is it?
I make a loud sound when I'm changing. When I do change I get bigger but weigh less. What am I?
I have keys but no locks. I have space but no room. You can enter but can't go outside. What am I?
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.