If you have money you can afford to lose and want to try to beat out an index, bet on what you know--that's not to say bet on what you're interested in. A friend of mine makes a few thousand every other weekend or so making sports bets in Vegas. He apparently knows enough to beat the odds but doesn't care enough to be emotionally invested in a team. Obama made me 17% apr. You can make money on almost anything. Any targeted recommendations here are probably beyond the opportunity of arbitrage.
If I had to bet on a specific industry: craft clothing. Five years from now your Bannaa Republics are going to have a special section for fair-wage/enviro-friendly/"hand sewn" clothing. It's the next progression for new domestics after organic food.
Edited, May 2nd 2013 9:05pm by Allegory