I don't do "real" betting. I'd do a modified bet (with you and/or eddie13 and/or other reputable forum members) where the loser has to donate 0.01 BTC to a charity of his choice.

To be clear: I'm not at all certain that Trump will lose, and although I don't like or support him, I'd prefer that he win over Biden. But AFAICT his chance of winning isn't even 25%, so taking a bet at even odds makes sense.