DBS Bank is bulking up its presence in the Greater Bay Area to tap China's wealthy who are sitting on hoards of cash after their traditional investment areas - property and stocks - turned in dismal performances. The opening of a strategically located new outlet in Central will add to the Singapore lender's network of conveniently placed branches in Tsim Sha Tsui, Causeway Bay and Central, to focus on customers coming from mainland China. The new shop will be the flagship store of DBS Treasures,