There's obviously nothing wrong with selling your art - only an idiot with a trust fund would tell you otherwise. But it's confusing to know how far you should take it.
I don't know why people are so keen to put the details of their private life in public; they forget that invisibility is a superpower.
Should graffiti be judged on the same level as modern art? Of course not: It's way more important than that.
I wouldn't want to be remembered as the guy who contaminated a perfectly legitimate form of protest art with money and celebrities.
Graffiti's always been a temporary art form. You make your mark and then they scrub it off.