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Perhaps in the future you can trade in game items for cryptocurrency. It would make things a lot more efficient.

Games already have this and again how is this cryptocurrency better than any other? Why not user Bitcoin, LiteCoin, etc.? Is GameCoin easier to integrate?

I'm not fully familiar with this project. I think it would be easier to integrate since the coin itself is made for games. I would check out their website, https://gamecredits.com. They also have a slack that is very active gamecreditsglobal.slack.com