The important thing is that we already know that LCC coins are not top-tier coins, so I don't think it's good to invest there even if you have done research on the coins that won't make you invest there.
Right, some investors invest in coins which he don't know or don't do any research before investment. They buy because they believe this coin is good and people have demand but they are investors on no research. Thats why he believes LLC coins.
He will regret it to follow the other people's suggestions without research because only with research, we will know if the coin will be profitable or not. If he can suggest his friend to analyze and research for that coin, I think he can save his friend from the unknown coin so he can decide to continue to invest or not. But if his friend doesn't want to listen to his advice, then let him choose what he wants, and we will see what will happen later to him.