In terms of investment is very wrong for someone to venture into Bitcoin based on the fact that he saw people profiting from it because what works for someone may not actually work for another and besides is only through trading we could possibly see someone easily profiting or losing, so perhaps in terms of investment one of the things that most be considered as a beginners is to truly know if you have a passion for Bitcoin or your intentions is to get rich overnight because in terms of Bitcoin investment is not good to force someone onto it because the only way to see a good profit in your investment on Bitcoin is for a long term holding so perhaps that's why investment should be out of willingness and passion instead of forcing someone.
I agree with you here. Investment should be done based on personal conviction and not an emotional reaction based on people's success or testimonies that may or may not be true. Neglecting personal conviction has made so many people fail in their investment so if you know anyone who has in any way rushed to start investing in Bitcoin because he was convinced by someone then you should give him this advice as it is will be helpful to such person.
Ask him if he has done his own research and most importantly if he understands the risk that comes in investment or has, he studied security in Bitcoin investment. No one should go into Bitcoin investment without knowing how to secure his investment since it is a self-investment.