Well it depends on the coin and the term of the investment, buying a strong coin immediately is good, if the price go down it tend to go up in the long term, but if you buy weak coin then need to be careful because once it drop it could be hard to gain momentum, nobody could predict correctly 100% when is the bottom, but by learning indicators and market situation it could help us to determine where will be the bottom
If having the skills to analyze indicators can make you have a prediction even though it is not 100% correct, then at least that is a separate motivation for him, so the bottom can be obtained for his own version. This method shows that he does not become a FOMO and will make his own decisions which in the end can make a good profit or may be a loss due to an mistake in analyzing the indicator.