at the end of the day people don't actually believe it, which is why trump is valued little. people who aren't willing to bet with their money on things they say so absolutely aren't serious people.
There are in fact people who avoid gambling on general principle, unrelated to any one particular thing they're being pressured to bet on.
again, if someone says they know the winning lottery and they don't play, they're unserious. nearly impossible to rig, high payout - outcome is of interest to layperson.
Either that, or they don’t have money to throw at dumb bets.
Some possible outcomes (I personally don't believe they are very probable), but...
There is no "call" or inaugurated at all, Trump stays on via some kind of "emergency". The market will fail to resolve to an outcome (based on what it says).
Somehow (via a normal election, or the outcome being decided in the House) one of Trumps sons becomes president.
This, I think, illustrates some of the problems with far out edge cases in prediction markets. Nailing down all of the possible outcomes exactly is hard.