"out of 10 white belts who start BJJ it is said that 1 will make it to blue belt
From 10 blue belts maybe 1-2 will get to purple...and so on
The factors that allow for someone to eventually reach blackbelt are not necessarily physical assets or talent.
If we can say that it is primarily mental/psychological factors that allow/result in 1 white belt eventually reaching black belt
It could be just that the black belt just has far more passion for BJJ than the others who didn't continue.
We might also conclude that the black belt has a far greater degree of resilience (rebounding from slumps, injuries and training interruptions); perseverance; lack of ego etc."
What keeps you training?
What do you enjoy most?
Would not getting promoted lead you to quit?
What might cause you to quit eventually?