Answer:
I cannot be bought, cannot be sold, even if I'm sometimes made of gold. What am I?
I am a ship that can be made to ride the greatest waves. I am not built by objects but built by minds.
I mean goodbye for South Americans.
I am black and white and full of fuzz
I run smoother than any rhyme I love to fall but cannot climb.
What do you purposefully put lots of in and on your body, but run away from when you encounter it outside?