i was in a fraternity in college, and know brothers (who know me, have come by my old place, took interest in my trading career, etc.) who are 10 years younger than myself...
if i had traded in college, i would have gone all the way
through college; having that degree, for whatever reason, gives you a backup plan, as well as a certain amount of respect.
i don't agree with the thinking (i know a couple programmers who became managers who don't have a college degree), but it's the way that most group-culture-think works.
oh, to get back on topic; nearly everyone i know closely is incredibly supportive, and sometimes 'wish' they could do it. there's a few who still can't believe it's a career, and most strangers think that i can only make money when the market goes up (and lose money when the market goes down). i tell them that as long as i get the direction right on the certain stock(s) i trade, i do fine...