Traders don't "burn out"....they fail. I just wrote a book on this subject. In my opinion, the main reason traders fail is that there are no barriers to entry to be a trader. Anyone can be a trader as long as they can fund an account. This leads to extremely unprepared "traders" attempting to make money chasing stocks around. They don't treat it like a business, and have no strategy before attempting to trade. If you go to failedtraders.com the first chapter of "Failed Traders: The 20 Common Mistakes Committed By Over 1000 Losing Trader"is posted along with the 20 mistakes.
