Does someones potential ability change or is it set in stone??
If I know a young player has a potential ability of 150, will this stay the same or is there a chance he could get better??
Thanks
This.The potential ability within a save stays as it is. Whether a player gets there or not is a different story.
However, between different saves, the potential can fluctuate, at least for certain players. A player who as 165 potential in one save might have 173 in another save.
This is also why some lists differentiate between "guaranteed wonderkid potential", meaning the potential is always gonna be 150+ and "potential wonderkid" with a PA that can be 150+ in one save but below 150 in other saves.