If Trump were the establishment candidate, all republicans would be giving him their support, but that's not the case. He was not supposed to get this far.
On the other side, pretty much all the corporate world aligned to make sure Hillary beats Sanders, and now they gonna do their best to make sure Hillary wins. She is the chosen puppet for the next 4 years.
If you are pissed on how things have been going for the last 30 years, vote some independent, but voting Hillary is exactly voting for the establishment. Under this people hands (republicans and democrats), social inequality is at the worst levels in the US history. So is there any good reason to keep voting the same sell outs to power?
Like it or not, Trump is the closest to voting for someone outside of the establishment. (between him and Hillary)
There is this unpredictability about him. He could very well feck it up completely, or he might end up doing a good job.
With Hillary you know exactly what are you getting, and its not good. Not good for the majority any ways.