User blog comment:Avery D. North/Great Kingdom/@comment-24769684-20160307025426/@comment-26803131-20160307144931

I disagree that it has to be something related to Luffy, it isn't his treasure. Plus the Luffy from chapter 1 may not care but I believe that he will grow a lot before/if he reaches One Piece. Remember that Rayleigh was willing to tell the crew the secret of One Poiece but Luffy was very much against such a boring adventure that he threatened to quit piracy. It's all about the journey, no so much the destination.