What do you mean by “bleed potential”?
Bleed is that moment where your in-game emotion starts to mix with your IRL emotional system. A non RPG example would be crying while reading a book/wathcing a movie. The same can happen in RPG where you're feeling angry, sad, happy because your character feels so. It's something that some RPG player (Mostly narrative games and nordic LARP) players look for.
The word actually comes from nordic larp but is also commonly used in tabletop https://nordiclarp.org/wiki/Bleed