Cash

Cash is an in-game currency that can be earned from winning matches, killing elites and players are able to double the amount of money they earn with cash boosters.

Uses
Cash can buy almost any weapon, equipment or gadget for the player, it's a very frequent currency since cash is earned at the end of the match, completing a mission or obtaining some from a dead elite.

Bank
The bank can be found in the player's loadout next to boosters, buying cash with real world money is not always necessary since this currency is quite more abundant then gold.