Because Microsoft points, filling your PlayStation Wallet, American dollars, and yen are just too complicated for online game payments, Square Enix has invented its own currency. No, not gil.
It’s called Crysta, and it will be used exclusively by Square Enix for downloading games and soundtracks off of their websites and microtransactions in Square Enix games. The program is Japan-only for now, but it will hit the States soon enough.
The simplest/dumbest part: one Crysta = one yen. Instead of converting your money to something new, simply replace the yen symbol in the price tag of a Square Enix game with the Crysta symbol; it will probably look something like this. Enjoy the future.