He has money.
He apparently has a loose sexual history.
Some women lie, especially if they are bitter.
It wouldn't surprise me if a MeToo claim appears out of the blue.
It wouldn't need to be true. That's the way it works. You just need to accuse someone and a payout gets made to avoid reputational damage and/or the expensive awfulness of a court case (file under Johnny Depp and Amber Heard).