All virtual currencies and virtual in-game items cannot be exchanged or transferred for 'real world' cash. Any winnings or rewards you earn in the form of virtual currencies can only be used within the game itself.
Occassionally, we may run sweepstakes in which players can participate for a chance to win real cash. Keep an eye on in-game notifications for the latest sweepstakes and promotions.
Check out our past sweepstakes here: https://www.jamcity.com/rules/