What Am I Riddles

Question: I do good things, but one small push could be a horrid disaster! I am normally used for decoration now.

Question: I have two rings. I move by request. If the mixture isn't right I just sit and rest.

What am I?

Question: What is as ancient as the earth but new every month?

Question: I'll capture you, hold you, and to your dismay, drag you thru space and time, all in one day. Move 'cross the globe with a single command, now tell me what I'll subject you to at your demand.

Question: What is red and white at home, but can never be that when it leaves?