The value of the XFC will probably not go up in the near future. From checking the block explorer for counterparty it seems like only 70M of the 150M coins offered were sold. Supposedly they will also offer another 150M coins for fiat (even if I can't find the roadmap on their website at the moment). The value was always in the initially undervalued assets in the game, not the coins. And they are both pretty much worthless unless the game grows...