Sebastian Piñera, who was Chile's president from 2010 to 2014, officially declared this week his intention to seek the office again this year, betting that widespread disillusion with the governing coalition will help him win over voters. Conservative Piñera who ranks 745th on the Forbes list of the world's richest billionaires, is bidding for the nomination of the 'Chile Vamos' coalition, formed by his party and the more conservative UDI.