

You can also go hunting for the trophies as well as completing a heist (I think it is only heists that give you 1 mill, because I tried and you can not abuse this on the jewlery store to just rush and make a lot of coins). NPCs in the safe house can give you side jobs that will give you some coins. It is also an excellent source of continental coins which can be used to purchase in-game assets like weapon modifications, safe house improvements, and gage boosts (purchasable on the mission prep screen) to benefit players in crime sprees. Leveling via epic crime sprees is without a doubt the fastest way to level in Payday 2. While you are presumably more 'in the loop' than anyone else here, I'm pretty sure Joakim stated in an AMA that concept for Infamy was scrapped due to an overwhelmingly negative community reaction.

There will be an upgrade system introduced with Infamy that will use these coins, as far as i'm aware.
