Answer:
I have a few points but we're not competing. I'll help you win when you're eating.
I am the ultimate killing machine used not once but TWICE I can be made by humans.
I save lives on the ground and in the air
The more you work the more I'll eat.You keep me full I'll keep you neat.
You do not want me when you donβt have me, but when you have me you donβt want to lose me.
When is it bad luck to see a black cat?