Cash is the main currency of the game and is produced by your Businesses.
They are used for:

• Unlocking new Businesses!
• Buying more Stocks!
• Automating your Businesses!
  

        Cash is always needed to unlock new Businesses and to buy more Stocks. You can increase your Cash production by:

• Automating Businesses, to earn Cash while you're not playing.
• Hitting Stocks Bonuses on your Businesses, to multiply your Cash production in that Business;
• Watching video ads, to double your profit.
• Upgrading Managers, to increase the profit of their associated Businesses.
• Upgrading Business, to increase their profit.