what are we to take from the scene of Kyle Chandler's FBI agent taking the F train home, solemnly looking around at his fellow passengers?

I've heard a few people say it's him, slightly resigned to his humble fate, realizing that these people need him to keep "fighting the good fight."

but I initially saw it as him realizing that Jordan was maybe right - he was a chump for playing it straight and skipping the Wall Street gold rush.