Answer:
I occur twice in eternity. And I'm always within sight.
What gets broken when you don't hold it?
What is something you can give away as many times you want without ever losing it?
I run cold and hot, I look blue but am red. What am I?
It is a popular afterlife destination where you want to send people when you're mad at them.
Though not a plant, has leaves. Though not a beast, has spine. Though many wouldn't need this thing, It's more valuable than wine.