Sure, there was the attempted assassination of Reagan and the fears for Obama as the first black President, but in those cases it was a lone nutter rather than a conspiracy.
How long can Trump crash the market before an angry billionaire decides to take him out? The remaining Koch brother is already pouring money into legal challenges against Trump…
I mean, it takes all kinds right? A desire to go out big can manifest in so many ways and he didn’t go after an A list actor, or a CEO, or any number of other high profile people. There is a reason he decided on Trump, even if his original impetus was suicide.