How will you feel if after you try convincing people around you to consider investments especially in bitcoins and they end up investing in another thing not bitcoins?
Of course, you are going to feel bad because the person that you have talk about didn't listen to you and instead invest on shitcoin. I have once case like that with my aunt, she invested on some shitcoins and lost $1000 in the process. That was 2 years ago when I last saw here, unfortunately she passes away,

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I don't see anything wrong with it because if he takes a step towards investing on his own after getting a good idea about investing, that's his matter. We shouldn't act on our bad feelings here. If he understands well and doesn't lose, then it's right. He can invest as he wants, it's his matter, and there can be nothing wrong with our bad feelings here.