https://www.bloodhorse.com/horse-racing/articles/254739/breeders-cup-reports-record-world-championships-handle

Curious
More people in the game wagering?
Or
The big guys wagering more?

shanahan: Well, count me in on those who wagered more than they ever had previously BC weekend.  The result?
All of my P5 horses finished 1st on Friday.  The payout?  $0
Horse racing tends to make us treat ourselves worse than we would treat others.

johnnym: I as well.
I had a good day Friday.
Gave 60% of it back Saturday.
On the sidelines for a while.
GL