He won't do the job. He will quickly pardon himself from all the charges he's now facing, and will appoint a few more judges that will cement his inviolate security, then he will just prat around till he's forced out of office (which he won't be because his party will be happy to do what they like while he occasionally comments favourably; it is possible to be almost completely nonfunctioning and 'run' America; see Ronald Reagan).I'm not sure why people place SO much faith, if you can call it that, in betting markets that fluctuate so wildly (as everyone knows).
I'm also not sure why so many people believe stuff that Trump says when he has a long history of talking shit. On the subject of his plan to kick out the "20-25 million" illegal immigrants (or, as Trump would put it, people from insane asylums), there was a great deep-dive by John Oliver last week about why his plan is either unworkable or would cost the country trillions and severely damage the economy. But people lap up the veiled (or sometimes not so veiled) racism like it was water in a desert.
I genuinely think he'll hate doing the job. The rallies are what gets him going. Doing the job of president? Not so much. Mainly because there's not much in it for him!