Different types of money in the game for different scenarios.

a different type of money from scenarios, like if you rob a bank you get a type of cash that has a chance to spawn a dye pack that will ruin the money in you inventory, including cash and dirty money, and turns it into ruined cash/ruined dirty money. and have a certain npc that can "fix" the ruined money/dirty cash. also other types of money, counterfeit cash that people can make with money printers that they have to find a specific black market dealer. foreign money you can get from importing/exporting cars in the docks, and having to get it changed at a currency exchanger. and more that you could think of.