MercadoLibre has more room to grow than many of its e-commerce and fintech peers.Several of the world's leading e-commerce stocks minted a lot of millionaires over the past few decades. For example, a $30,000 investment in Amazon's IPO in 1997 would have blossomed to a whopping $92 million today. That same investment in Shopify's IPO in 2015 would have grown to about $1.3 million.Amazon and Shopify are still both solid long-term plays on the secular growth of the e-commerce market, but it could be tough to ...