Popular massively multiplayer online games, such as "World of Warcraft," have created a market for valuable game identities loaded with gold or other hard-earned forms of in-game currency that can be used to buy new weapons, magic spells or other trappings to advance within the game.
"The police are really good at understanding someone stole my credit card and ran up a lot of money. It's a lot harder to get them to buy into 'someone stole my magic sword."'