That is absolutely true for newbies. They have too little experience to choose to invest in new projects. However, choosing the top altcoins is less risky but means that they will make less profit. Profits always come with risks, so I always advise them to stay here long enough to make a profitable investment.
Basically, all investments have risks, even if someone who is experienced even though there will still be risks if he invests, only in this case what is more emphasized is to minimize the risk through the experience he has, so for newbies they are highly encouraged to learn first and try it in the amount they can afford to lose.