Avoid ending up like a friend, who used all the money he has to invest in bitcoin and also took a loan, promising the lender that he will pay back when he gets paid in a month, after a month he never received the salary, I warned him doing this, because he has no doubt mixed investment with 'whatever it takes', is it safe to call this greed? I don't know.
He needs investment advice and that is your responsibility now. But based on his statement, doubted if he would listen to you. What I can see is that he already got an influence on what he sees on the internet bringing them a huge interest in putting his money into an investment that he is not really familiar with and does not even have experience with. Yes, that is already greediness and we know what is the possible outcome of such an idea, losing. If he won't listen, that was his decision and I believe you have done with your part already.