StreetArt is the best way for me to express my self, if a man wants a space to express him self his happiness, anger or hope what's better than a wall on a street that will be seen by unknown number of unknown people, and aside of being a way of expressing and a space that we -as Egyptian- missing all the spaces for free expressing.
Other than that i believe that street art plays another great role in increasing the visual culture for the viewers specially if they are living in such country with the dusty gray color as the main tune on every building every wall even the greens are dusty.