It's a lie that bitcoin hasn't changed in the minds of people, I've seen a general change and people see it as a opportunity more nad more, what there is a lot of is that people don't know how it works, and it lends them to be scammed very easily! We as bitcoin heads need to help inform our friends and family on the most common scams at least
In last few years the thing has changed certainly, people anymore doesn't believe that BTC is a scam. That's why lots of people getting interested in it. Still lot of people out their who does not have any idea about it.
Another point is several times BTC comes into the NEWS headlines due to wrong reason, like recently twitter hack. Media does not tell about the positive side of BTC that much it should be. So somehow it creats an negative impression in some persons mind.