People selling coins so they can buy back cheaper to increase their BTC total = greedy. People not selling their coins because they believe the value will shoot up higher again sooner or later = common sense.
In a bear market, the opposite is true. Uber-bulls are greedy and will have to sell even lower. Bears are the ones with common sense.
I strongly disagree and it has little to with bulls or bears. I can feel bearish at a particular moment and still think holding bitcoins makes the most sense. Or I can be bullish but still decide to secure some profits and sell a few bitcoins. In bitcoin, bear markets always turn out to be bear traps. They are unpredictable and often don't last as long as people think (2011 is the exception, but in the end still a sound decision if you held). So who's actually the one with common sense here looking at history? Also it can be disputed whether we are actually in a bear market right now, but that's just semantics.