It's a common coin, still worth one dollar.

A bicentennial is the 200th anniversary of anything. For example, the American Bicentennial was 1976, the bicentennial of Abraham Lincoln's birth is 2009.

None of the Kennedy bicentennial half dollars made for general circulation have any silver or are worth more than face value. Only Proof and collectors coins sold from the US Mint are worth more.

None of the Bicentennial half dollar coins made for general circulation contain any silver or are worth more than face value. Only Proof and collectors coins sold from the US Mint are worth more.

Bicentennial or bicentennially