Cash is the main currency in LGO.
Cash is generated by the properties You own and can be collected each time You enter the game, but not more often than once every 15 minutes.
The amount of cash You receive from properties is calculated like this:
Income = Rent - Costs.
Properties that are undergoing Paperwork do not generate Rent, but still have their Costs.
You can also get Cash by selling Your Properties to the Bank, other Players or on Marketplace. Selling Property to the Bank requires You to pay 20% tax and selling to other Players or on Marketplace 10% tax.
Last way to get Cash is exchanging some of Your coins for it.
Cash is used to purchase Properties near You, make Direct Offers to other Players for their Properties, make Offers on the Marketplace and Levelling Up Properties.