Invisible Performance

I was influenced by a psychological book "Trauma and Human Existence" and at that time in my studio practice I was dealing with such terms as economy of care and economy of violence. For me trauma is a certain amount of love and care that should have been provided by the care-givers, but for some reason was not. In a way it like a theft and this theft affects our decision-making process, forms us au individuals and dictates the way we treat other people around. This strong economy terms made me think about banking system and how banks used to trace money in the case of theft. So I bought invisible powder for the installation. On the X day I put it on in my palms and in a very casual manner met new people, shook their hands and made them dirty without even them knowing. I do not have photos of that performance as besides that in my practice I question myself on what is art? How visible/visual it should be to still be considered as one?