Is online gaming susceptible to cybercrime?

All the different currencies are offer many arbitrage opportunities which people naturally take advantage of. They are "illegal" until they are taxed, I mean regulated. Then they are fine :-) To get them regulated, a story is make up that they are enabling "terrorists". Like normal money, cars, and breakfast don't? It's funny, and not new. Because markets are fragmented, gray and black markets are profitable.