Investment refers to the formation of actual capital and can be seen as an act of increasing future consumption at the expense of current consumption. According to the above definition, which of the following is not an investment behavior below? ['Lao Zhang bought another dry cleaner for his dry cleaners.', 'Old Li deposits a sum of money in the bank.', 'Lao Lin purchased a machine tool.', 'Lao Zhao purchases 5000 piglets.']