First make sure you have two profiles.  then Get 500 Koins in each
profile.  Then go to the character select screen in veruses mode. 
Load your profile and the other profile then wager 500 koins.  Then
unload your profiles and load them again.  When you go to the wager
screen you will have 1000 Koins.  Keep doing this until you have
the desired amount of koins