Oniums, such as positronium, are particles formed by a particle and its antiparticle, which raises questions about their existence due to potential annihilation. Despite their inherent instability, oniums can exist momentarily, with very short lifetimes; for example, charged pions last about 26 nanoseconds, while neutral pions exist for approximately 8 x 10^-17 seconds. The common center of mass in systems like positronium may prevent immediate annihilation, allowing these particles to exist briefly. The discussion also suggests that oniums might represent a transient state before annihilation rather than stable entities. Research into their discovery and behavior is encouraged to better understand their formation and existence.