Treasure

Treasure is normally seen as a collection of gold and/or silver hidden somewhere waiting to be discovered. However Treasure can refer to anything valauble from old vase worth millions to a vow between friends or a memory of a experince. Sometimes what one person may consider to be a treasure, others may not hence the phrase:

One person's trash is another man's treasure

Geneally, a treasure is something that a person is not willingly to give up without a fight.

One Piece
In One Piece, the idea of treasure has been raised a number of times. While most like Buggy or Nami value gold, silver and jewels, there are others who hold other treasures dearer to their heart:


 * Luffy considers his Straw Hat his treasure because of his promise to Shanks.
 * Zoro considers his vow with Kuina to become the best Swordsman a treasure and carries her sword with him always.
 * Robin considers history more valauble then gold and to her there is no bigger crime then destroying something from long ago sych as a set of ruins.
 * Gaimon considered the animals on his island a treasure after finding out the treasure he was guarding for 20 years was already gone before he got there.
 * The mayor of Port Town considered his town his treasure and was willing to fight Buggy for it.
 * Crocodile considered Pluton a treasure as it was the key to his dreams of conquerering the world.
 * To the Shandians their former home of Shandora was their treasure and they were prepared to die for just one bag of Vearth

One Piece itself is named after the treasure of the later Pirate King Gold Roger. The biggest mystery (after its location) is what it is.