Hmm To be honest this is the reason for their mistake that they didn't even study the best things like Bitcoin, Blockchain, etc., and they say that it is a scam, high volital, blah blah. I say that if they dig even a little bit deeper into the topic of what Bitcoin is, I can confidently say that they will become a fan of Bitcoin more than us. Because it's clear as day light that Bitcoin/Blockchain technology is a highly capable technology that no one has ever seen in the history of finance the same immutable, decentralized ecosystem as Bitcoin. So if these ignorant people even read out little bit about the Bitcion that what it is, how we can benefit from it, etc., then I hope that those people will also consider Bitcion as prominent instead of considering it a scam.
This is a view that is too optimistic, the opinion of those people is based on their feelings and what they have heard other people say, it has nothing to do with the facts and the robust technology behind bitcoin, so even if you were to take the time to explain to them why they are wrong, they will still not change their mind, and if you refused to do this and let them to their own devices, I can assure you they will never take the time to read anything about how bitcoin really works.