Ha, the same was said in the recent Labour leadership election.
Trump may well win the nomination, but I see no chance of him winning the presidency, just like there is zero chance of there being a Prime Minister Corbyn.
The scary thing is... what if there is another 2008 style collapse? What if the emails come back and Hillary is in serious legal trouble? Anything can happen in this crazy world.
While anything theoretically could happen, unless the Fed suddenly jacks up interest rates to 10% or so, we're not looking at an economic meltdown, possibly some slowing, but no 2008 style collapse. Similarly, the idea that there is anything actually harmful beyond what has already come out is fool's gold for the GOP. If there ever were anything useful for them on that server, which I doubt, it's already been long ago deleted. I can imagine a situation where Hillary has to leave the race and let her running mate take her place, but I doubt that would do more than turn a blowout against Trump into a closer race.