How search engines work is part of it. "Not" is a common 3 letter word, so easily missable in the scheme of things, as opposed to matching on all those other words.

I'd say that the world has always been on the brink of economic crisis. Something to do with lending out money at interest and demanding more back. Ah, but this crisis will be worse, people say. It was ever thus. Upping the ante is part of the rules of the game. "They can't keep creating money for ever", people say, but when asked why not the logic goes hazy.

I avoid such metaphors as "economic collapse" (and it is a metaphor) - too much FUD...