Answer:
People want it, and when they have it, they use it by giving it
Four kings of whom I am one lord. Often on deck but never on board. Though I have a large heart, I am always seen at war. During which I always wear a suit, but never a suit of armor. Who or what am I?
The day is their night and the night is their day, when I shout and they shout back I run away.
These are the bumpy parts of your digits
What can be any size or shape and gets bigger the more you take from it?
What never gets any wetter no matter how hard it rains?