According to the BBC news, this was the latest update yesterday.

This is an exciting bet. I would regret not participating in this. You know how Trump plays the game by being unpredictable and that makes
this bet really exciting and confusing. The odds for Biden is actually something to consider, for now, he got the highest odds and got a lot of votes based on the survey. But then, we will still be waiting for the analysis so we can see how would this bet work!
Which survey is it?
I agree with you that this is an exciting bet if you will going to make this a way of having excitement during the election process. Anyway, the best thing to do here is to make a platform or betting thread for this one and we will going to see which really between the two running candidates has the higher odds.
My bet will goes to Trump. My opinion is very simple and that is because Trump is an Incumbent official and has higher connections that he can use with his current positions.