Bitcoin price was growing significantly for more than a year already, so mainstream media started covering it more and more and that made many people in financial world to start voicing their opinion about Bitcoin. There can be many reasons why exactly they are doing it- may they feel that Bitcoin is a threat, maybe they just want to get some attention from the media, maybe they want to try to manipulate the market. But I think that people who seriously consider investing in Bitcoin should form their own opinion by studying Bitcoin themselves instead of listening to others.