What Am I? Riddles

I’m a very valuable thing to have. Use me right now, you should. Yet if you cut off my hindquarters, I’d be but a piece of wood. What am I?

I’m always hungry and must be fed, the finger I touch will soon turn red, What am I?

I’m am everywhere and a part of everyone. I am at the end of space and time and existence itself. What am I?

I’m an old relative who’s hand’s can’t hold anything and eyes can’t see anything. What am I?

I’m Arabic, but if you speak English, you probably use me every day. What am I?

I’m as simple as a circle, worthless as a leader; but when I follow a group, their strength increases tenfold. By myself I’m practically nothing. What am I?

I’m grown from darkness but shine with a pale light. Very round I am, and always a lady’s delight. What am I?

I’m lighter than air but a million men can’t lift me. What am I?

I’m made for one but meant for two; I can be worn for many years but usually just a few; You won’t ever need me unless you say you do. What am I?

I’m often running yet I have no legs. You need me but I don’t need you. What am I?

I’m precious. Furthermore, I’m half Fear and two thirds ironic. What am I?

I’m rarely touched but often held and if you’re wise you’ll use me well. What am I?

I’m really blue, but when you see me I’m red. You don’t see me too often. I’m there for you if you’re hurt, but I’m good for you. What am I?

I’m so simple I only point, Yet I guide people all over the world. What am I?