Billionaire investor sees opportunities to profit from various economic and political issues afflicting the world****************************************Getty Photo************************************ George Soros’s worldview has darkened over the past six months amid escalating economic and political issues in China, Europe and elsewhere. Photo: Eric Piermont/Agence France-Presse/Getty Images *******************************************After a long hiatus, George Soros has returned to trading, lured by opportunities to profit from what he sees as coming economic troubles.Worried about the outlook for the global economy and concerned that large market shifts may be at hand, the billionaire hedge-fund founder and philanthropist recently directed a series of big, bearish investments, according to people close...