Why Become a U.S. Citizen? Some permanent residents have held their green cards for decades and for various reasons have not applied for citizenship through the process known as naturalization. One client had been wavering back and forth for about 30 years as to whether or not he should apply. When he came to meet me for his immigration consultation he brought in the various versions of the forms that changed over the decades and showed me a history of the fee increases over time. He had finally felt it was time to become a citizen after seeing how the forms had only gotten longer and ...