In the words of a video-game character Ezio from Assassin's Creed, "They condemn what they do not understand." When people see something queer or novel to their senses, the most logical and initial response they would give out is one out of fear or repulsion, this is definitely normal since it appeals to our basic instincts. Then again it is always proven that early adopters and believers who broke past what their instinct tells them flourishes and succeeds.
Those who do not know very well about Bitcoin and have been making various negative comments about Bitcoin from the beginning, only make negative comments about Bitcoin on various social media.I avoid all these people all the time. Especially where the big businessmen of the world invest bitcoin, there is no need to listen to the small limestone.
Thing is, avoiding them won't do anything for bitcoin or crypto, for us established believers their FUD won't have any effect but for potential investors, they'd have a massive impact, so an information rally or campaign is necessary to provide proper info about the upsides and downsides of investing in bitcoin, that way they can base their choices and opinions in something much more intelligent rather than making choices out of spite.