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From the replies, I think I would just help him understand Bitcoin better and leave the rest for him. If he wants to buy then fine, if he doesn't, still fine.
It was the right decision, and I support you in doing it. Giving investment advice to someone is a bad idea, but it would be great if we could provide all the knowledge about bitcoin for them to understand and make their own decisions.
My brother and a close friend are also asking me if I should invest in bitcoin or not. Because they see that I have a stable economy after investing in bitcoin for a while. But I answered bluntly that they shouldn't invest because they know nothing about it. If they want to invest, they need to have knowledge first.