Answer:
I mean goodbye for South Americans.
I never sleep yet sometimes I weep. I can get angry or just be happy. Wherever you go, I will follow. No matter what you do, I will be there. I cannot die. What am I?
Can not be bought, Can not be sold, Even if it's made of gold. What is it?
I dig out tiny caves and store gold and silver in them. I also build bridges of silver and make crowns of gold. Sooner or later everybody needs my help yet many people are afraid to let me help them.
My head bobs lazily in the sun. You think I'm cute, for my face is yellow, my hair is white and my body is green. What am I?
What do you purposefully put lots of in and on your body, but run away from when you encounter it outside?