There is legally no upper limit or maximum restriction on the amount of physical or digital money an individual can deposit and keep in a bank account. However, standard federal deposit insurance provided by agencies like the Federal Deposit Insurance Corporation (FDIC) or the National Credit Union Administration (NCUA) typically covers standard depositor accounts up to two hundred fifty thousand dollars per depositor, per insured institution, for each account ownership category. Individuals with funds exceeding this threshold utilize specialized programs or multiple institutions to secure full coverage.
There is no single unified entity known as "First National Bank," but rather hundreds of completely independent financial institutions across the United States that historically incorporated using the phrase "First National Bank" in their title.