This egg doesn't want anything to do with rotten, old-fashioned banking. One of the largest Internet-only banks in the world, Egg has some 3 million customers that use its Web site to access mortgages, personal loans, savings accounts, unit trusts, and life, health, auto, home, and travel insurance. Users can apply for the Egg Card or Egg Money, credit cards that offer rewards or cash back on purchases. Citigroup bought Egg from UK insurer Prudential plc for more than $1 billion in 2007. Founded in 1998, Egg is now part of Citigroup's UK consumer unit.