Well yes and no, I will premine a small percent of the coins and those that I mine will be purchasable (in order to prevent inflation), however players will be able to mine their own coins in game and have several choices to chose from in terms of what is available after they do so:

-Exchange them for real currency or other virtual currencies.
-Buy things in the store with them (skins, potions...).
-Trade them with other players (for items or simply just to give them away).

Also, unlike mining coins bitcoin-style, you do not require specific hardware parts or software, all you need to do is play the game