Answer:
What is always on its way but never arrives?
What is taken before you can get it?
The profession of Jimi Hendrix and Eric Clapton
What goes up when the rain comes down?
What comes in many varieties and can't be seen or touched, but it often makes you move?
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.