Only if it makes you feel better. Objectively, it does nothing.
In another opinion, lest the two not become confused:
Moonstone connects with the feminine nature and the energy of the moon. It increases empathy, fertility, and intuitive ability. It is especially helpful to women, but not exclusively. It perceives what is, it finds your true nature. It is useful in meditation especially when looking into yourself. It is said to bring good luck and soothe emotions and its color may alter with time. To keep this stone recharged place it in the light of a full moon and retrieve it in the morning.