With the development of technology and the very easy dissemination of information today, I think it is not ignorance or a closed attitude that people have toward Bitcoin. They may know but do not study.
I speculate more that people who fall into that group have concerns about not holding or using fiat. So the assets they have are fiat that they carry for transactions anywhere. When they are given a new opinion regarding using Bitcoin as a transaction tool that can replace fiat. There will be thoughts of losing the most valuable asset they have.

With the development of Bitcoin and many people talking about it, I am still sure some people think Bitcoin is a scam. But I prefer to avoid people like that. Not because I don't want to defend or anything, Bitcoin is growing extraordinarily and I think that is enough to prove everything.