You can check the market conditions for buying or selling crypto If you have a good idea about the market you will know the right time to invest. This is a good time to invest in altcoin but it is important to check which currency is performing well.
What you say is true, but I am sure they also already know how the current market conditions are so they can choose the best when investing, but your advice is still good and will not be stale for them even though they will not consider it.