~ It's a necessity, I can't imagine anyone out there being a winning player in any stakes without bluffing. Not only is it great when you actually get it through but there is value in being caught in a bluff as well. They are less likely to believe you the next time you actually have a winning hand and might call down with something weak. I believe that's why some people think it's a good idea to show the bluff at times when it gets through.
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I've noticed that it works the other way round as well. If you fold several hands in a row, your opponents might have an impression that you play only very strong hands, and because of that you can easily get away with bluff afterwards.
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I will take any bet, that I rather will (have to) quit betting at some point than becoming a millionaire with it.
I think it's not only you, but any pro gambler should think this way. That's what makes the lives of some gamblers miserable, they hope to become a millionaire with their gambling.