re: Poker & Is That 99 Worth It?
I actually had this discussion with a buddy earlier this week. If my assumption is correct, the question you're asking is, "If things are going my way, I'm in a comfortable position in regards to my table and stack, should I risk a good chunk of it on, in most cases, a flip?"
The short answer is no.
The long answer, if you have a significant edge on the table, there's no need to call off an all-in if said all-in would make you go from comfortable to defensive. In your example, in most cases, you're looking at a flip, some cases behind against an overpair and the unlikely case of dominating a lower pair. It's not worth giving up your dominating position and losing the hand will likely lower your morale, unless you have some solid tilt control. There's also a ton of spots where folding AK pre against an all-in is the better choice.
However, and this is just in a general sense, there are exceptions:
1. If it's anytime in the mid to late part of the tournament, and you'll still have 50bb+ if you lose the hand. You still have a decent stack size to be aggressive.
2. If you're getting around 2:1 odds
3. You have a solid read on villain, knowing he shoves light and in most cases, will be at least a 2:1 favorite on winning the hand.