These elite funds style themselves as the alpha predators of the investing jungle. But their investors may be the only ones to get bitten. <p>With 2015 shaping up as the worst year for investing since the Great Recession, investors are wondering where to turn. Stocks? They had a tumultuous and disappointing year. Bonds? Credit concerns multiplied, and spreads widened. Oil or other commodities? Fuggedaboutit. For many investors, institutions in particular, private equity beckons as a singularly soothing and lucrative safe haven.</p>