"As we explained earlier, day-trading is one of the dumbest jobs there is: According to one academic study, 4 out of 5 people who do it lose money and only 1 in 100 do it well enough to be described as "predictably profitable."
Most of the folks who do it, in other words, would be far better off working at Burger King."
Most Wall Street traders have skills, information, and tools that day-traders can only dream of. Trading is a zero-sum game: Market moves aside, every dollar won by one trader comes out of the pocket of another trader. Day traders competing against Wall Streeters is the equivalent of a college football team (or Pee Wee team, depending on the day-trader's skill) competing against a pro team. Is it possible to win? Yes. But it's highly unlikely (1 in 100). Wall Street's winnings do have to come from somewhere, though, so Wall Street thanks the day traders for playing.
PLEASE READ the FULL article here:
http://www.businessinsider.com/henry-blodget-heres-what-day-traders-dont-get-2010-3?IR=T&r=US&IR=T