I show them my portfolio. I show them the Bitcoin price drop and rise patterns. They have their jaws dropped after seeing my results with cryptocurrencies.
That is the best way to convince someone, if they see you making profit, it will convince them. You should share your experience with friends and family.
I would say, that i would stay calm, some of my friend used to hate me too or bash me because they kept saying that what I am doing is a scam but I know what is real so I never listen to them instead I am telling them to try this, and it is not my problem anymore if they don't want to try.