If this guy wanna go to the save investment and he should use top 10 CMC to invest his money but remember that he was not using his cold money. It will be very risky to invest in the crypto with his salary but this is still worth to try. He can spend at least 5% - 10% from his salary to be used to invest in the crypto. If that guy wants to make more money from altcoins and he can look at the low marketcap tokens in the market. That makes sense for him to start spend a few percents from his salary as investment for the future (legit crypto).

And then you should not give any advice for him coz you're sure if next year may be bearish for the crypto. he should do his own research to determined which was the best crypto to invest for him. I tell you now if's better to let him to do his own research rather than give him an advice. That's his responsibility with his money.