~I am the type of poker player 1, I don't know why I do it, it looks bad but it makes me profit too. I always look for a full seat and wait for a good card for All in when I get a big win I leave the table 
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All in when the good card is good strategy but don't get too confidence the opponent might have the better card. .
But I am not good at poker and will never try to get in more money on that game.Not only the opponent might have better cards, but he\she can win with any cards if they are lucky. I play poker a lot, and I've seen many times when someone with pocket Aces loses to a bluffer with, say, 7 and 8 unsuited, because there, actually, can be a lot of such outcomes. For example, in 10-player Texas Hold 'em the probability of winning with pocket Aces is just 31.36%, in the case all 10 players stay in until the end.
I also practice this pattern, mentioned by @mitchr4, sometimes. If I win 3 times more than the money I was entering with, I leave the table, at least for a while.