I kind of hope he fires Mueller just to see what happens after that. I feel like that would be the beginning of the end for Trump.
Although I suppose the best scenario for the most people in our country (and the world, to some extent) would be for the Dems to make big gains in 2018 and then for Trump to lose badly in 2020 (assuming he even wants to run). President Pence as of late 2017 might not be such a good thing.