(Bloomberg Markets) -- On a sweltering late-summer evening last year in southern Egypt, the country’s most storied hotel was bustling once again, hosting personalities with ambitions of shaping the world. In the more than a century since it opened, Aswan’s Old Cataract, perched on a rocky outcrop on the Nile River’s eastern bank, has welcomed the likes of Winston Churchill, Jimmy Carter and Tsar Nicholas II. For Agatha Christie, in whose former suite you can now stay for upwards of $8,000 a nigh