The phenomenon is this: he's the first candidate to be able to say anything and open up sacred cows. The media can't shut him out, something that has never been accomplished before (social media, I often mention how big media literally doesn't know how to handle it yet). Normally they could either freeze his assets, freeze his business, or freeze his appearances. Now they can do, literally, none of it. And the Twitter Suppression Machine that normally shuts down anything else that slips through isn't big enough to do it either because again...there's nothing they can shame him out of or silence him in fear of. It's both disgusting, because of Trump as a person, and exhilarating because media control is all-pervasive and seeing its control shattered would be beautiful.

No Trump and Bernie suddenly has the full weight of the media on him. He'd have been blacked out so fast it'd have made your head spin because he can be frozen rather easily -- he's reliant on a whole slew of donors and constituents even if he's not beholden to them.

I don't expect Trump to last through the end of this year let alone next, but it's good for Bernie as long as he does (imo).

Edit: I should point out I don't think Bernie will remain very freezable; by the time Trump drops out, the lack of Bernie being removed by that point should make it too far along for him to be treated like Ron Paul. In theory.