I think it depends on exactly what stage of "in the money" we're talking about.
If the bubble's just burst, quite often the entire field will be playing loose and making regular pushes all-in. The reason for this? Quite often there'll be a number of people who have been playing uber tight on the bubble, just to make sure they get in the money. Now they've reached their goal, but but they're short stacked. If they want to go any further they need chips and they need them right now. Hence all the shoving.
During this particular phase, if you've got an average or better than average stack, you might do better to stay a little tight. Call the short stacks when you've got a good hand and keep accumulating chips. But if you find yourself with something marginal, you'll probably be better served just to throw the hand away, let the short stacks bust each other out and just take a ride up the payout scale.
If we're talking about deep in the money (say, the last couple of tables when the top 50 paid) then I think any general rules go out the window. There may be another mini-bubble just before the final table is set, but for the most part you're going to be needing to make reads on individual players and the mood of the table as a whole, and use that information to inform your play.