He can challenge for the all time home run record held currently by Barry Bonds. He is young enough to have plenty of time, barring prolonged injury, to easily break the record if he continues hitting home runs at the pace he does now.
His rookie cards are great to invest in if you think that he will be able to break the home run record, or if you just want cards of one of the best players in baseball right now. He also, even at this stage, very likely to be inducted into the hall of fame on the first ballot, in my opinion. There is a post following this one on this thread with a link to Alex Rodriguez rookie cards.
