The market is generally unpredictable, atleast to the best of my knowledge, it's hard to tell when Alts will rise and when they will fall, I have always believed that the best way to profit from Alts is to select the good and solid ones and invest in them, withdraw the Alts to your private wallet where you have the keys and seed phrase written and saved up somewhere safe and only the investor have access to it, then forget about the Alts and check back years later.
Staying with the market and always looking at the price movement of alts is one of the things that easily drive some investors into Panic selling.
Alternatively, alt investors should also have other related investments outside the cryptocurrency market, so as to diversify their focus and panic attacks, this helps a vivid practice of your suggestions. What push most people to sell before hand is the reliance on their investment to fetch a quick profits. Which is never the right way to follow any kind of cryptocurrency possession.