Answer:
I am easy to waste and unstoppable
I make a living following the wealthy and beautiful.
I am a seed with three letters in my name. Take away the last two and I still sound the same.
I am two-faced but bear only one. I have no legs but travel widely. Men spill much blood over me. Kings leave their imprint on me. What am I?
Find me on body builders or in the drink aisle.
What is lighter than what it is made of?