NB: Always remember this, you have not made a loss until you sell
After a price dump comes a price pump
Never allow your emotions to do the thinking for you
Always go with your gut feeling
I disagree, mostly because you are technically calling bitcoin a "pump and dump" in your second line whereas bitcoin is nothing like a pump and dump!
but also because your statement looks more emotional while you are telling everyone not to be emotional. the fact is that there is nothing wrong with selling. in fact you must sell bitcoin at some point. but the problem is when people have no plans when they buy bitcoin!
if you are buying it to trade then you must sell and then buy back in the dips. if you buy it as an investment, again you have to sell when in bubbles and buy back in the dips. if you buy it as a currency then you need to spend it constantly.
but what people do is they buy to become rich, and they usually do it in a bubble then panic sell when the bubble bursts and then cause the crash.
in short if you want to sell, never sell in the dip. sell BEFORE the dip. and if you can't then maybe you shouldn't look at the price at all.