I had an argument with a friend just yesterday, who seemingly believes that Bitcoin is being controlled by a single entity and Bitcoin is not secure.
He said a lot to back his claims which although I can't remember his pin points though.
I knew once that he doesn't really know much about Bitcoin so I decided to back out of the argument.
Misconceptions like this are merely caused by lack of education (Bitcoin related) and sometimes education in general.
There even might be people in this forum who have similar misconceptions, the question is how do we tackle this misconceptions?