The first thing here that's important is that he came to you for advise and was willing to learn about Bitcoin, it's more easier for someone to understand crypto when they concentrate and their mind is fully made up. If you were the one that went to him and tried to convince him then I don't really support that. There are lots of people like this that are looking for something to make money from passively, the world has gone digital and making money now isn't all about doing a lot of hardwork. Those that have taken advantage of the crypto market are now enjoying the benefits of it
I agree with you you totally on this one. When someone comes to you in search of a knowledge, the person tend to be more serious than whoever you go to. First of all, the person who came to learn from you must have developed the burning passion to gather such knowledge before approaching you in the first place. If you were the one approaching him, whatever you say or teach such person can be taken with a pinch of salt.
Everybody is search of knowledge today knows how to go get it even if it as far as China but is not always the same experience for those who you went to meet to teach the knowledge . Even the shoalin and taekwando students go to the school to learn how best to play such martial arts and you don't expect them to sit at home where their masters come home to teach them.