To be honest, you don't have to convince people about Bitcoin not a financial pyramid or whatsoever they think of it, let them be. Well, I've said that because convincing those kind of people is pretty hard and they will just put the blame on you if they try Bitcoin and lose their money on it because of volatility that will be their reason to panic and cash all out their funds on Bitcoin, how ironic isn't it?

That's why I never bother explaining it to them. If someone will ask me about it all I say is "you could find more accurate answer on google and there's a lot of tutorials in YouTube", something like that, because I don't want to waste my time on such people. I mean if they are really curious about it, they will do everything to know what really Bitcoin is.