I think it would be beneficial if you give him an idea of Bitcoin instead of trying to convince him. But when you try to convince him he will start depending on you at some point if he starts investing and he will totally blame you for losing. Hence one should refrain from attempting such a work. However, since Bitcoin is a widely discussed topic worldwide, many people may not know about it, so if you give them an idea about Bitcoin, you can only teach them about Bitcoin who will be encouraged to invest. They should also be aware of the fact that there are profits from Bitcoin and there is a high risk of loss. If they are motivated to invest then they need to be given some basic ideas on how to buy and hold bitcoins and security issues.
I agree with your opinion. It is better to give a detailed explanation about bitcoin than to convince him to invest in bitcoin. because apart from depending on us, when he makes a wrong decision or experiences a loss he will blame us for the loss he caused. However, if we provide knowledge and provide an overview of Bitcoin, he will research it himself and find out for himself, so that even if he dives into the world of crypto, it will be entirely his own decision.
Of course, when we give a half-hearted picture of Bitcoin, we have to give a complete picture, starting from the benefits, risks and importance of wallet storage security. In conclusion, never force or convince people to invest in Bitcoin because it will be risky for us in the future, but educate them about Bitcoin. This is what I do if a friend wants to invest in bitcoin. I don't recommend buying bitcoin before he understands bitcoin completely.