Lynne Marek of Crain's Chicago Business profiles the Pritzker Group's investment strategies and the advantages of private capital: Billionaire J.B. Pritzker is known in Chicago for backing flashy digital startups run by people half his age, but that's not where his big money is. It's in metal castings makers and pallets. Mr. Pritzker and his older brother, Tony, have dropped more than $1 billion of their Pritzker Group's funds on definitely unsexy companies across the country