Soulja was hanging out with Sean Kingston in L.A. last night after the game ... and explained why he felt so confident bettin' on the birds. It's pretty solid logic.
So what's he gonna do with his winnings? The 22-year-old says he plans on dividing the money between his retirement account and a low-risk mutual fund ... JUST KIDDING HE'S GONNA BLOW IT ON SOMETHING REALLY EXPENSIVE!!!!