'A promise to go on giving': What 9 of Warren Buffett's closest followers told us about his final letter as CEO

Warren Buffett published his last letter as Berkshire Hathaway CEO this week.Daniel Zuchnik/WireImageWarren Buffett released his last shareholder letter as Berkshire Hathaway's CEO this week.The famed investor's close followers celebrated the wisdom, humility, and strategy in his writing.Here's what nine Buffett disciples told Business Insider about what could be his farewell letter.Warren Buffett published his final letter to shareholders as Berkshire Hathaway CEO on Monday, as he prepares to s