What Am I Riddles

Question: I don't have eyes, but once I did see. Once I had thoughts, but now I'm white and empty. What am i?

Question: I have 3 eye colors yellow red and green when the red eye opens everybody freezes. What am I?

Question: Once you are in my sight, you are gone in a flash, and people tend to use me for cash. I am often used as a dire assist, and people often believe that I cause harm, when I am but its catalyst. What am I?

Question: I always murmur but never talk, i always run but never walk, and I have a bed but I don't sleep. What am I?

Question: I never was. Am always to be. No one ever saw me, nor ever will. And yet I am the confidence of all who live and breathe. What am I ?