Tell him to focus on bitcoin first and ignore altcoins because they are made for one purpose only, and that is to make their creators rich while bitcoin is created to give you financial freedom.
I agree with you with the fact that bitcoin give financial freedom, it is an independent Coin that has the decentralization and also have security that why it is regarded as best and secure coin among the cryptocurrencies. We have twenty (21)millions bitcoin in existence, this alone means alot because it can not manipulate in any form. Bitcoin is totally different from all other altcoins because of it popularity, easy access, zero risk and so on.