The financial press loves to feature outlandish predictions, the wilder the better. More often than not, journalists act as cheerleaders for Wall Street (that's especially true when featuring buy-side analysts, without questioning their motives). But once in a while, the press publishes bearish claims. The point of these alarmist articles isn't accuracy, it's to create a good storyline. Sure, everyone knows these prophets of gloom are full of it (i.e. their investment advice is about as valuable as a fortune cookie's), but their claims usually bring lots of clicks. Why? For the same reason people slow down to look at car crashes!
The permabears themselves don't mind being so publicly exposed as Chicken Littles, as they get to peddle whatever they are selling (newsletters, websites, books, hedge funds) in the meantime, before they inevitably get proven wrong. And even then, there's usually no such thing as bad publicity for these inaccurate prognosticators!
Here are some examples taken from Michael Johnston's compilation on the Fund Reference (the site is now unfortunately defunct):
Postscript: Needless to say, all of these dire predictions turned out wrong. I guess it was bad luck to make them during one of the longest running bull markets in history.