Some people don't see Bitcoin as a normal currency and think it's too risky because its value can change a lot. They also worry that it's used by criminals for illegal activities like money laundering.
A lot of people see Bitcoin like this, especially those who are not really knowledgeable about Bitcoin. They probably heard about Bitcoin but aren't really into it because of these thoughts and images they have. Well, it's true though... Bitcoin is risky and can also be used for money laundering, but Bitcoin isn't really just about that. Some people only knew negative things about Bitcoin that they don't want to be involved with it. But this kind of stigma will change once they really get to know what Bitcoin could bring.
However, other people think Bitcoin is amazing because it's different from traditional currencies and could change how we use money. Nobody knows for sure what will happen to Bitcoin in the future, but people are still talking about it and interested in it.
Like everybody of us here think Bitcoin is amazing because we know what it can do, and how we can use it. Others probably also thought negatively about Bitcoin at first, but once they get a deeper understanding, that negative thoughts can easily change.