Costco is one of the world's best retailers and has been a wonderful investment. It's set to remain the former, but the latter may be a tall order.In this video, Motley Fool contributor Jason Hall explains why Costco (COST 0.49%) has been such a wonderful investment, but also why it may struggle to beat the market going forward.*Stock prices used were from the afternoon of Oct. 31, 2024. The video was published on Nov. 4, 2024. ...