Bidzina Ivanishvili has been called all these things, and more. The billionaire, Georgia's richest person and the founder of its ruling party, is seldom seen in public and, of late, almost exclusively behind bulletproof glass. Ivanishvili can gaze down on downtown Tbilisi from a massive steel-and-glass clifftop mansion that rears about 60 metres over the capital, complete with helipad.