Money is the main currency in Shadowgun: Deadzone.
Symbolised by a dollar sign or a bundle of cash, Money is the most common currency you will find in game. It is earned simply by earning points in game, and the money is given to you once the match has ended. Money can also be acquired by trading in Gold.
Once acquired, money can be spent on weapons, items and perks in the research menu. You can either research entirely new things, or upgrade the weapons you own.