"If I had done 'Titanic,' it would have made, probably, $200,000 - worldwide. So I think my life would have been very, very similar"

Billy Crudup is reviewing his profession and the choices he has made. He is suggesting that if he had played Jack in the film Titanic, his life would have been very similar to what it is now. He is indicating that the success of the motion picture would have made him a lot of money, but insufficient to significantly alter his life. He is also recommending that his life is great as it is, which he is content with the choices he has made. This quote shows that Crudup is a humble and reflective person, who is grateful for the chances he has been provided. He is likewise knowledgeable about the possible success that might have come from taking a different path, however is content with the life he has chosen.