Immigration attorney Karen-Lee Pollak explains how to get a green card by investing in the United States. The E-2 Investor Visa allows an individual to enter and work inside of the United States based on an investment he or she will be controlling, while inside the United States. This visa must be renewed every two years, but there is no limit to how many times one can renew. The investment must be "substantial". Investor visas are available only to treaty countries, which include countries like Albania and Senegal, but do not include Brazil, Russia, India and China.