If someone who is new into crypto space wants to invest in any coin, I will advice the person to ensure that they purchase or invest during the dip time, because if you invest because the market is promising, rather know that you are investing for short-term, but someone who has the experience of investment, should invest at any time, depending the target of the investors, their's no specific or special time to invest in crypto, the aspect I should concentrate on it, is that we should invest with spare capital and also we shouldn't be curious to invest.
It is better for newbies to always go for dips than to just invest in promising times because they may end up not able to handle the loses which could be recorded during such trades. I guess you're taking about trading which involves taking high risks, being it the spots trading or the futures trading. I will also advise whoever going into trading as a beginner should please focus more on spots trading than futures because it comes with lesser risk. It is also important to trade softly and not hastily trying to make quick money. It is also important to learn more about trading with minimal risk and not just jump into trades without solid understanding and knowledge of how it operates.