1. The odds are against you (or anyone else) being consistently profitable through all of the different market environments that lay ahead.
2. The odds are also against you maintaining your sanity and staying one step ahead of machines that are learning your strategies and being trained to kill you.
3. More importantly, the frustration of putting in the work, deserving to succeed and then losing anyway is one of the worst feelings known to man, a crushing blow to one's psyche, ego and soul. The thing about short-term market speculation in what is essentially a complex adaptive system is that this will happen all of the time no matter how hard you work…..
Don't stop reading now....There's more at http://www.businessinsider.com/day-traders-should-own-their-firms-2013-5