It’s easy to do, here are the steps -
1. Open the game
2. Go to the world map ( the screen with the server select and online list )
3. On top of chat to the right there’s a “vault” button. If someone does an action ( kill, win, level up etc. ) money is generated and put here. Simply tap it and you get the money and can be used normally. Remember it’s divided amongst the squad, so if someone makes $1,000 and there’s 10 members in squad, each person gets $100
Now don’t worry, this money is generated automatically, it isn’t taken from savings.
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You need to be in a squadron otherwise it doesn’t work