I am still doubtful that Numista classifies charms as coin replicas...
It has nothing to do with money; it's the entire Chinese philosophy of life, which in the West is summed up by Feng Shui.
For example, regarding the symbolism of your "charm," we know that dragons are often depicted as chasing a round object that resembles a "pearl." The pearl is frequently depicted as a "flaming" pearl that is on fire. This pearl represents a ball of fire composed of qi (气), which is the dynamic creative force of the universe (Taoism). Dragons, who can animate nature, will fight to gain control of this generative energy. The pearl can be seen as a metaphor for perfection and enlightenment.
The pearl is also assciated to the moon. As a dragon devours the pearl, less and less of the pearl is seen, and the pearl appears as a waning moon. As a dragon disgorges the pearl, more and more of the pearl is visible, and the pearl therefore appears as a waxing moon. The dragon and the pearl thus symbolize the endless cycle of transformation. Frequently, the "pearl" is depicted with flames, which symbolize magical powers and may represent the wish-granting pearl of Buddhism. The pearl can also refer to wealth, pure intentions, and genius in the dark. This flaming pearl is one of the Eight Treasures. These "charms" with the flaming pearl are auspicious signs and help in developing one's work and career.
