The concept of in-world or in-game virtual currencies is an interesting one—especially when you layer in the ability to trade online goods for real-world currency. Here’s what happens.
Game players want to buy virtual things in their virtual worlds, but don’t want to (or can’t) build up the currency via normal in-world means. So they pay other players real-world cash for the in-game currency that the other players have built up by playing the game. In other words, if you want to level up, you can pay for some other player’s tokens that get you to that level.