There are all these different areas of specialization. That's it. You have to be a specialist nowadays. There's no other way. I was an artist for a long time, but I was always into being a general practitioner. I did a little of this and a little of that. And nothing got me anywhere. You have to specialize. If you don't specialize, it takes you until you're about fifty years old before anybody notices that you're doing anything at all.