The fact is people around me doesn't know what bitcoin is. Even well experienced and educated teacher also don't know what bitcoin is and when they hear about it they think that is useless and so they don't care about it.
It is very sad to hear about that. I think they must at least know how bitcoin truly work instead of nothing. It can be considered as a crime if someone claims that bitcoin is useless 
have you try to convince them yet ? Professionals who earns large fiat money through their profession do not have time for bitcoin. We cannot blame them if they view bitcoin as useless currency because they are already satisfied with their fiat income and their time is dedicated to their profession.