This question has been raised several times, and I have noticed that some people conclude that the lack of adoption is due to people not understanding Bitcoin or seeing it as a scam.
We have freedom of speech which anyone could choose what to say and when, the first year bitcoin was introduced, many begin to say manners of things concerning bitcoin because they had been once in a shoe of getting scammed, cheated on way or the other and they have lost their investments especially on digital technologies online and wouldn't want to believe or gear anything associated to online digital networks.
But I don't think the world still views Bitcoin as a bad thing today, though I know a lot of you thought that, but it is not the case.
Some still have that kind of ugly look on bitcoin but the mistake i see them doing is for them to have made that on other crypto projects believed to be fake and full of scam, to the greatest surprise, this same people may later decides to give a try but fall in hands of the scam project because of their inexperienced in bitcoin or cryptocurrency at large.