That's nothing new but human nature.
If a gambler wins big, he does not win just the money but your friend in him (the person you knew) loses against that gambler. And he thinks that the society may come and ask him for money because he now has that class to lend people, but he doesn't want to. So he decides to stay away from his friends thinking that it'd be better to sideline them and enjoy his life on his own, with some new friends of his category.