You don't get $250k in exchange for the napkin. You'll be able to possibly convince someone to pay $25k for ~9% of the napkin, contingent on you devoting the n

You don't get $250k in exchange for the napkin. You'll be able to possibly convince someone to pay $25k for ~9% of the napkin, contingent on you devoting the next months/years of your life to exploring napkin-like directions until it either burns or blossoms. (If you already have a product with revenue/traction, there's plenty of reasons to counsel AGAINST taking the money at those terms, by the way. Or any terms, for that matter.)