Answer:
My second is performed by my first, and it is thought a thief by the marks of my whole might be caught.
It is a form of plastic money.
These are believed to be found at the end of rainbows
Possibly the word most commonly said before taking a sip
Up on high I wave away but not a word can I say.
I am used for light yet I am solid. Without me you would feel enclosed. I hate being touched especially with a lot of force. I like to be in buildings.