I see I can only choose one option. I was briefly tempted to pick "criminal enterprise" to be contrarian. Wealth gained by black or gray market activity still counts as entrepreneurial or work activity, but wealth gained by violating someone else's life, liberty, or property is immoral. That is why I am anti-government, after all. Don't steal or murder. Government hates competition.
If you were a criminal, what kind would you be?
I live in the "Land of the Free," so I probably already commit about three felonies a day, but merely existing in a Byzantine authoritarian system isn't exactly profitable. It also suggests I shouldn't self-incriminate online. 😉