Quick question.
Have you ever bought the dip, but then the price breaks through the support and continues dropping deeper for weeks or months? 
Well, I have done it before.
The problem may not be panicking but may be determining the actual dip before a pump.
Not every dip is worth buying
Yes but in altcoin not in bitcoin, I've sometimes bought the coins when the dip comes but it actually keeps going lower and lower so I sold my coins for 50% losses and buy again when the coins started to stable for a week. Well maybe I was in rush that time because I dont want to miss the train but I learn from there that we shouldn't panic to buy the dip.
Tried it as well with altcoins many times in the past. I have to lose a lot before I learn the hard way that it's hard for altcoins to dominate. It's not fun to see investment drained while you could have profited with BTC going up.
There must be another quick dip soon to retest that $40,000 support. It's sure to be a good time to buy BTC when you are awake when that takes place.