What does hair represent?

Hair symbolizes an asset of beauty which is lost all too easily. "Her Hair" takes the value of physical attributes quite literally, as the queen’s act of cutting off Rapunzel's hair is what sends the prince falling down from the tower and losing his sight. Yet the hair has already had a sufficient effect on the prince to prompt him to seek out Rapunzel again and to make him determined to be with her. The fact that she no longer has this asset is something which Rapunzel feels the prince will take too hard so she pretends that it is still attached to her head, taking advantage of his blindness. That he was able to see the (golden) hair just once is evidently enough for him to continue to pursue this asset even after he can no longer see what he is pursuing.