Have you ever had an experience where a coin or something accidentally fell into a roadside sewer and felt too unlucky. In fact, the initiator of this "bad luck and depression" is the psychology of "loss.
And what would a product look like when the two mentalities of "loss" and "gain" are mixed together. Losing something will be sad and depressed, and getting something will be happy and happy.
"Lost and Gain" piggy bank is such a product. Every time you deposit a sum of money, you often think of the time you lost one day, so wouldn't you cherish every coin you save more?
Only lost, just know how to cherish!!!