My personal observation is that people who talk one way or the other about violence have no idea what real violence is. I think they should be careful.
Having said that, people who don’t like a president only have to wait a few years and they can vote for another. In this case two years. Might as well take your stock market returns for now, and get busy campaigning in 2020.
The US.has had plenty of inept presidents and it is still here and still going pretty strong. One unpopular real estate tycoon is not going to sink the ship anymore than would a Hollywood movie actor, a Texas oil tycoon, his son, a narcissistic Arkansas sexual predator, and law school teacher who was appointed to the Senate and orated his way into the presidency.
When you get right down to it the White House is sort of a clown car.