He's 80 years old and has already had more than one stroke, and you think him dying in his sleep is out of the question?
You are right though, if trump died or was removed from office, I would absolutely expect conservatives to start assassinating liberals and Democrat politicians, especially considering a trump supporter already committed a political assassination last year in Minnesota, and how conservatives were openly calling for liberals to be murdered after charlie krk was killed, it's definitely believable.
When trump is no longer president, there will be celebrations all over the world. That's how horrible of a person he is.