Its not as groundbreaking as you think (or I think).

If the CAI generated from the game can be transferred to your wallet and then eventually exchanged to btc/usd then that would be groundbreaking.

Tho things attached to that like gold farming etc will be abused so people can make money which would lead to the currency be next to worthless.

It be groundbreaking if even with the abuses, the currency keeps its value.