The majority of millionaires are self-made, and they have accumulated their wealth through a combination of hard work, education and investing.

The sectors that produce America’s wealthiest people include finance and investments. Despite the recent economic challenges, the U.S. economy has been growing steadily for years, creating new jobs and opportunities for people to earn more. The stock market was on a bull run for several years, which helped millionaires increase their wealth.

A surge in entrepreneurship, including building tech startups, helped mint new millionaires. More people are getting college degrees, which is leading to higher-paying jobs and more opportunities for wealth accumulation.