Spoiler alert: You'd be grinning ear to ear. (Those who didn't invest may still do so now.)Here's an interesting question: If you'd invested a mere $1,000 in shares of MercadoLibre (MELI -1.29%) a decade ago, what would they be worth today? The answer will either thrill or annoy you, depending on whether you've owned the stock for those years: $20,605. That's an annualized growth rate of 35.3%! In comparison, the S&P 500 index averaged 11.7% annually, turning $1,000 into $3,011.That information is all well ...