because the buy in is $50-$300, most guys buy in for the min up to 200. What are you possibly confused about? Passive, old businessmen don't 3 bet pre flop when they have more than $200 at the table generally. If they have from 50-100 they are willing to gamble it up with weaker hands. Obvioulsy some guys make moves pre flop with weaker hands, but passive businessmen which make up a lot of the people in the games I play do not. The point was, 450bb's deep and getting in with A,K pre you better have a strong read on your opponent.