Of course they have the right to express their own opinions but there are people who are talking below the belt and sometimes you just have to bear the pain because sometimes they're just laughing at you and sometimes they are doing sarcastic talks and that's why I'm being silent these days because someday these are gonna be worth it or " hardworking in silence" so they say.
There are times when I'm really irritated that I want to cash out all my btc and slap them a pile of fiat in the face. It's okie to have their opinion but talking behind your back and below the belt is really getting into my nerves. I need to learn how to control my emotion now because that would be bad when you are easily irritated and you have a lot of cash. Balance emotion cash and social relationships.
I would say that one of the "flaws" of a regular guy is that we always feel that we have to always deal with negativity. They talk behind your back, there's a reason why they are behind you. Remember that. They are behind you not only physically or figuratively but they are behind you in life. You have bitcoins, that's all that matters. Their opinions and how you fight your battle against them isn't relevant. I think that you're just going to stress yourself if you start facing these people. Just continue being low-key about the things that you do (that's how it should be anyways) and let the bitcoin haters hate.
It's possible that they are actually jealous of you for living ahead of them and having an advanced way of earning money. People hate themselves so they cope with it by throwing hate to other people too. Nonetheless, it shouldn't matter.
When I talk to those type of guys, I just neglect them. Because after they start to express their stupid ideas, it's really hard to accept their thoughts. And there is really no need to debate with them which won't result anything.