Answer:
I get paid to shoot people then blow them up.
I have a little house in which I live all alone. My house has no doors or windows and if I want to go out I must break through the wall.
I am enjoyed by some despised by others. Some take me for granted some treasure me like a gift. I last forever unless you break me first.
I cover what's real; hide what is true, but sometimes bring out the courage in you. What am I?
Take it and you will lose or gain more than the others.
Almost everyone needs it, asks for it, gives it. But almost nobody takes it.