MercadoLibre (NASDAQ: MELI) is far and away the largest e-commerce company in Latin America. But its success has attracted attention, and competition is ramping up. Does the company have a defensible position against newcomers to the region? It does. In this segment from “The 5” on Motley Fool Live recorded Sept. 30 , Fool.com contributor Brian Withers talks about the reasons he likes MercadoLibre for the long term.