Although not up to the same historical level of Saving Private Ryan, The King's Speech or Lincoln, I believe Titanic carries a message just as strong as all three: material items don't go with us when we die. Our lives, and the people we love, are worth more than jewelry. I'm not the world's biggest James Cameron fan, but where he's got a point I absolutely agree with, especially when it's about the Titanic, I can't ignore it.
The Hobbit: The Battle of the Five Armies Trailer (Main Trailer
See Trailer - Bilbo and Company are forced to engage in a war against an array of combatants and keep the terrifying Smaug from acquiring a kingdom of treasure and obliterating all of Middle-Earth. - http://www.imdb.com/video/imdb/vi1092005657?ref_=cs_ov_vi