That question is literally the thing that defines wether you are going to be a great entrepreneur or not. Great entrepreneurs, the one who can repeat success, k

That question is literally the thing that defines wether you are going to be a great entrepreneur or not. Great entrepreneurs, the one who can repeat success, know the answer and often they know almost nothing else. To a certain extent, it's the question that folks like Paul Graham or David Cohen believe they know how to answer.