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.
Power enough to smash ships and crush roofs. Yet it still must fear the sun.
What has roots that nobody sees, and is taller than trees. Up, up it goes, and yet it never grows.
What flies without wings?
We are five little objects of an everyday sort. You will find us all in a tennis court.
I am rarely touched but often held. If you are smart you'll use me well. What am I?