infinite.
The average person has more potential then they can bring to fruition in an entire lifetime. Many go about this fact by squandering all of it. Acting as if it is an all or nothing engagement and since they can’t realize all of it, none of it will be just fine.
Others choose to realize their highest potential first. The engineering-minded chooses to become an engineer is an example of this.
Others choose to realize what is most fun. Analyzing literature for example, or even sports.
Others choose to realize what potential others expect of them.
The reality is potential is just that, potential. Realizing it start with the decision to pursue it with persistence, consistency and generosity.