Hello Chennai,
Intraday is Not Dangerous but it is certainly risky..
coming to your third question, I bet that person who made 34 lakhs in 2 yrs had some kind of jackpot or may be he had a fairy telling him what to buy and what to avoid during the intraday
So, if u think u have a fairy or some kind of magic mirror u can go ahead, but in my opinion and many trader friends it is a big NO