http://www.coindesk.com/bitfantasy-mmorpg-players-trade-virtual-items-for-bitcoin/Well, that's actually a fantastic application for BTC. Imagine not having to convert from fiat to in-game gold and just keeping a small Bitcoin balance instead to trade for items.
As for the inclusion of Bitcoin, it was a pragmatic choice. Part of the game’s specification was to allow for player-to-player trades with real-world money. Darren looked at PayPal but found it far too complicated to implement. “I don’t think it would be possible to implement the direct player-to-player trading in any other way. For us to do the same thing with (for example) PayPal would require every player to have a PayPal merchant account, and for me to have their API keys and other shenanigans that I don’t even want to think about.”
The risk for any online game including real-world money is that a “pay to win” climate is produced. However, BitFantasy is avoiding this by restricting the ways in which real-world currency (including BTC) is used. Darren stated: “So you can’t buy gold pieces. You can’t even buy items with BTC unless you buy it from another real human player; computer-controlled shopkeepers only trade in gold pieces.”