Whenever I am waiting for a coin to pump, I usually wait for the price to rise up high before selling. I don't let my emotions control my decision making because I know it would led me only to mistakes that I would regret for a long time. I also buy whenever the value of the coin is still low so that I can regain the money I've lost after buying all of those but that's still a risk since there's no real certainty that a coin would have an increased value even after a very long time.