Warren Buffett stands as one of history's most successful investors, and he's dispensed plenty of quotable wisdom in his decades of guiding Berkshire Hathaway to incredible returns. Shares have gotten crushed due to a combination of inflation, other macroeconomic headwinds, and regulatory changes implemented by Brazil's government, basically cratering the company's credit business. With the shift to card- and app-based payments and the rise of e-commerce still heating up in Brazil and Latin America at large, this beaten-down fintech stock may have big upside at current prices.