Since DL recently released so not much people have $ so heres my cousin's idea

BANKING

earn interest = Earn $$ without playing

You can put as much money as you want as long as you have that much. So each day the interest is different, you can put your money in or wait another day.
Of course theres a penalty if you take the money out early it will be have of your gold that you put in.

Credits-Daunstoppable

-Late