If Trump loses in a landslide, like there's such a historic rebuke that he's unable to steal the election through chicanery, then I think will he will sulk like the little toddler that he is, go to his vacation home in Florida, throw a hissy fit, sign off on whatever judicial program Mitch McConnell wants to do, and literally say "fuck the American people, if they don't want me then they're not going to get anything," And try to death spiral the economy.
There is a glimmer of hope, however slight, the Trump -- in his perpetual indolent weakness -- resigns the presidency for the final 2 months, Pence gets sworn in, and Pence proactively pardons Trump for any federal charges "as a pre-emptive measure to protect him from the radical left mob." I don't think it'll go well for either of them. While I want Trump brought to justice for corruption, Trump resigning in the face of defeat, declaring how unfairly he was treated, and then Pence trying to shield him from retribution of being the worst president of all time, whatever, as long as there's a peaceful transfer of power and the adults can take over and put us back on track.
The big fear for Trump is that his creditors are going to start calling. Once his hotels aren't worth a damn to stay in anymore, they go belly up immediately.