The internet is replete with people referring to bitcoin as a bubble. They are spreading fear, uncertainty, and doubt galore. They believe bitcoins high price spells impending doom, but their criticisms move beyond mere skepticism. It seems like they just hate cryptocurrency. Yet many of these pundits do not fully grasp bitcoin
or even economics. 
People perish because of lack of understanding, and if you look at people that are spreading those bad news, they dont understand the whole concept of bitcoin, they just heard probably from one of their friends that bitcoin is a scam, bitcoin is a bubble and so on, and then they started carrying the rumor also without verifying the whole thing.We cannot do without having people of such, but we have very strong community too that are solidly behind bitcoin and they are strong to send powerful signal to the world about bitcoin, despite all their fud news, countries are beginning to adopt it, even countries that would not accept it as currency are beginning to legalize it as investment asset, so for those calling bitcoin bubble, they are still much in the dark.