Your potential keeps changing while you develop.

Potential is not a fixed quantity waiting to be discovered. It changes as you develop, since each new capability makes further capabilities reachable, and the ceiling you would have estimated a year ago was calculated with a smaller set of inputs. Any assessment of what you could become is really an assessment of what you could become from where you stood then.

Be careful about deciding your limits from your current position. Give yourself another year of genuine work before concluding anything. The estimate you make afterwards will be based on a different person and will usually be higher.