4. Gambling Distortion Pattern IV
I think the fourth pattern of play is the most dangerous, because when you have a few moments of big wins in the midst of several unsuccessful bets, the player feels motivated to place more bets believing that in the end he is managing to make up for the losses, or at least you feel more confident to continue playing because you know that at some point or another you will win again, but winnings usually cannot cover all losses.
I guess I can speak for everyone about this whenever we try to do a comeback to our gambling session after a loose streak, we often encounter a loop of pattern III whereas we deposit once again and after winning a few times we end up losing everything again. This is also where greed comes in as we try to continuously gamble even after losing a few times already in hopes of winning back our losses. And, yes, this is a dangerous way to gamble, and this is why it's important to assess our gambling activity and know when to stop whether it's on loss or not.