Answer:
It is a form of plastic money.
What is always coming but never arrives?
A tower at the root of all confusion.
A canvas full of stars.
I'm the start of eternity and the end of space. There are two of me in heaven and one in hell.
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?