The Sem answer:
Don’t sell. Bitachon says if the Ribbono Shel Olam wants you to win, you will get the full amount. If not, you get nothing. There is no reason to sell.
Problem: Perhpas the RBSO wants you to get the amount being offered, and not the full amount of the lottery, and if you don’t sell, He will give you nothing (as you did not do your Hishtadlus).