Nu Stock: Buy, Sell, or Hold?

Is it too late to buy after it doubled last year?Nu Holdings (NU -2.12%) is a Brazil-based company that's on investors' radars because it's in the Berkshire Hathaway portfolio. It's a tiny percentage of the whole equity portfolio, accounting for only 0.3%, but it packs a strong punch as one of its only true growth stocks. Is it right for the individual investor's portfolio?Nu is reporting extraordinary resultsNu is a digital bank that operates in Brazil, Mexico, and Colombia, and it has demonstrated incredi ...