What would you do if you could rewind the clock 20 years and buy Amazon stock? I would guess just about everybody would buy it knowing what they do today -- and watch their investment gain more than 7,000%. Since you can't turn back the clock, you might be interested in buying stock in a company that, in many ways, is quite similar to Amazon, but reporting even higher growth rates than Amazon did 20 years ago. MercadoLibre (MELI 0.54%) stock has gained about 6,000% in its lifetime -- but you should still bu ...