Because of this, some think of graffiti as a "vanishing art form" that's only seen occasionally on the street by chance and cannot be collected and displayed in a museum like a traditional art work.
塗鴉因此被認為是一種「消逝性藝術」，只能在街頭短暫偶遇，不像傳統作品能一直被美術館等空間收藏。