Treasure in a dream often symbolizes hidden potential -- a talent, opportunity, or sense of self-worth you haven't fully uncovered yet. Searching without finding it can reflect a reward that still feels out of reach, while discovering it often names a strength in yourself you're just beginning to recognize.
If the objective is in the nature of the ruler the acquisition will be easier, and vice versa. - Picatrix (Andalusia, ~1000.AD)