I think it's still early days. But if he wants to learn, let him know all the risks good and bad altcoin. Just like the thing, I teach beginners, who only just know the good thing and know when people have successfully invested in Dogecoin for the long term. Teach and tell the truth with him that even if the risks faced are also great, he could lose a lot of money if he is not good at reading the market situation. I am sure that if the two things are good bad he already understands, he is ready for all the risks and does not affect his psychology later if it happens beyond what he expected.