Answer:
I have green hair a round red head and a long thin white beard.
When I come in from sea to shore twenty paces you'll see No less no more.
I climb higher as I get hotter. I can never escape from my crystal cage.
What loses its head in the morning but gets it back at night?
I keep growing and am practically indestructible. I get eaten, but always come back. I survive cold and lie everywhere. You see me everyday. What am I?
Whoever made me don't want me. Whoever bought me don't need me. Whoever use me don't know me.