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.
That is a good decision you have taken, if they invests in BTC of their own choice and understanding, there is a better chance they would not make a blooper and lose it, and you also would not be worried about losing your friendship with them if they are unsatisfied with the short term result of their investment. If you want your friend to even understand BTC much better, advise them to join the bitcointalk forum, this is where they will get the best information they need.