Where the money is, and where it isn't

One possible angle for choosing locations is to have the victims of cybercrime in the world's financial centres (London, Tokyo, New York, Pihtipudas etc) while the actual criminals would be in more out of the way places where they're safely beyond the reach of the law.

The financial centres would be like the rich side of a town, while the criminals would be in the poorer part.

This kind of simple viewpoint isn't necessarily what happens in real life, by the way... :-)