Honest answer is from your information he is unreliable and not really interested in bitcoins. If you want him to learn computer security let him think he got hacked and lost all of his video game characters or in game money lol. You will get his attention faster that way.
Steve
Done that. It got his attention. The problem now is to keep his attention long enough for him to learn something. He came up with the bitcoin idea so I'm trying to seize the opportunity!