You've likely seen a Labubu at some point scrolling through social media, and all that attention drew investors to parent company Pop Mart (PMRTY). Lee Munson says that while "no fad is sustainable," the craze's international attention has brought in a notable amount of revenue for the company. However, Lee says a lot of that revenue came from "blind box" gambling. He gives his perspective on the investing lessons investors should take away from this pop in Pop Mart.