Reading Time: 1 minutes

Jack Dorsey, co-foinder and Chairman of Twitter and Square, a mobile payments company, during an interview at Oxford Union, Oxford, England, November 21, 2014 (Credit: AP Images/Roger Askew)

Jack Dorsey, co-foinder and Chairman of Twitter and Square, a mobile payments company, during an interview at Oxford Union, Oxford, England, November 21, 2014 (Credit: AP Images/Roger Askew)