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.
What does no man want, yet no man want to lose?
What has a spot and is very bright, is sometimes, red, white, blue, yellow or green and is often blinding.
They're up near the sky, on something very tall. Sometimes they die, only then do they fall.
The barber of New York shave all men in New York. No man living in New York is allowed to shave himself. The barber of Nee York lives in New York. Who shaves the barber ?
What did the piece of wood say when he saw the screwdriver and screws approaching?