It's a lot like 'depressed' was/is a catch all word. I remember seeing so many people saying they're depressed like its just an emotion; a replacement for simply saying they're sad, when in reality depression is a mental illness which (like bipolar disorder) can't be diagnosed without seeing a doctor.

The word 'bipolar' is now on a similar level - the word is being thrown about like its nothing, and the knowledge of the true severity of the illness isn't increasing as much as the popularity of the word.

RB