Purchase dead patents for peanuts, sue real company, make billions.
$$: If you win, hundreds of millions per year.
The upside: You feast on ill-gotten meat you did nothing to hunt or dress. Look at all that money you did nothing to earn!
The downside: Almost impossible to get good PR.
The dark side: Hard to see. Trolls are happy to be trolls, and do not get insulted when you call them trolls or feel bad when they look in a mirror and see a plump, successful troll.
Where you go from here: Ogre.