what you do is a form of caring for your friend and who is the loser in that, of course he is, because he ignores you and prefers to buy altcoins instead of bitcoin.
but too much concern can make you an annoying person so you have to stop trying to be a hero for him, and let him buy Bitcoin really with desire in his heart. not everyone can survive in the crypto investment and not everyone will be lucky to choose Bitcoin as their investment.