Trump seem strong one but chance can be considered 50/50, better to wait few more weeks.
Just like I wait buying bitcoin as I expect the price to go up. It makes totally sense, or does it?
What do you mean for sell your bet @2.0? How to sell a bet??
For example at fairlay.com you can lay Hillary now, and when she loses terrain you back her. Another way to approach this: bet on Trump now and when the chances even out later, bet on Hillary then to cancel your Trump bet and take profit.