Paul Singer likes to get what he wants. The 76-year-old New York investor now considering a bid for Aryzta trained as a psychologist and a lawyer, and has used both skills to amass a $3.6 billion fortune, according to Forbes. Much of this arose from his investment in Argentinian government bonds. When the South American country defaulted in 2001, instead of cutting a deal, Singer took Argentina to court – for 15 years. His firm eventually received $2.4 billion. Three years ago, Bloomberg dubbed Singer “the world’s most feared investor”. He started his hedge fund firm Elliott, which carries his…