You know the Diane Arbus photograph of the creepy kid with the toy handgrenade, looking as if he could kill his own mother? Someone once remarked -and I found it to be both funny and true- can you imagine some manager hanging that picture proudly on the wall behind his managerial desk in the big office room? He might fear the reaction from a visitor: “O, nice, your grandson, I suppose.”
Photographs with strangers on them don’t seem to be attractive as a decoration. Much too confronting, too personal. People who have the taste and the money to buy a good photograph will still prefer a landscape (in color most of the time) or something perfectly meaningless, but aesthetic, to the more problematic work of say, Robert Frank or Winogrand. So, if you want to make money from photography without having to wait for fame, forget street photography. Do it for passion or you will be disappointed big time.