I think the difference here is one is talking about not trading during crazy times of crypto world itself and one talks about not trading during your best hours. Sometimes, people are not on their best case mentally, you might be tired, you might be angry at something, basically you might be either emotionally or physically in best shape and that means you are not in the best time of your life to trade, trades during those times usually end up being filled with emotions and result with bad results.

However, trading during crazy crypto markets when it goes up or down a lot due to volatility could be depending on how good you are, if you are a good trader you can make profit at anytime, if you are not then it is risky. Those are very different two things and should not be mixed.