From the financial district times

"'girl with balloon' already broke an important auctions record for bansky, selling for $1.4m. after its recent shredding, we certainly expect this important work to raise the bar even further. while casual art observers consider the work to be destroyed, collectors are drawn to its one-of-a-kind circumstance. we wouldn't be surprised if it's already doubled in value."

in a paragraph of at least five sentences, answer the question: was bansky's action one of vandalism or art? include at least one specific reference to each excerpt in your response.