Bonds a sure thing?

As of this writing Bonds PSA 10 TT card is $210 on the pit. He's only about
three homers away from passing Willie Mays! When that happens is it safe to
assume that the card will be worth at least $450? I mean it was around $300 or
more when he broke McGwire's record, and the all time Home Run record has stood
for longer and held by a more mythic figure. Either way you can't got wrong in
investing in Bonds right? Its like money in the bank. They could hold my money
for two months and I could make alot of money, more than a certificate of
deposit could ever generate