Warren Buffett's cash hoard is a blessing, not a curse, and Greg Abel must be careful with his more hands-on approach, veteran investor Tom Russo told Business Insider ahead of Berkshire Hathaway's annual shareholder meeting. Abel succeeded Buffett as Berkshire Hathaway's CEO at the start of this year, taking charge of the conglomerate's $373 billion of liquid assets as of December 31. That reserve has ballooned in recent years as Buffett, perhaps the world's foremost bargain hunter, has