most users who name coins to invest with are also those holders, hence, they are suggesting what they have in he hopes that some people will buy such alts and make some noise also. in such a way that it can give more interest to traders.
That is just the reality of the situation, even if sometimes we complain about influencers using their power to try to get people to invest in a coin in particular, the truth is that if another investor had that kind of power they will use it for their own benefit as well, and the only reason they do not do it is because they do not have the skill to do it, so instead they engage in a small scale promotion and when they see other people asking questions similar to what we see on this thread, some of those investors will take the time to promote the coins in which they have invested.