Look at the coin again and post new question. No US 1 dollar coins are dated 1918.
$10.08 to $111
Look at the coin again and post new question, no US one dollar silver coins were made in 1918.
What you presumably have is a James Buchanan presidential dollar coin. It was minted in 2010 and is worth one dollar.
The bicentennial dollar coin is still worth one dollar.
The bicentennial dollar coin is still worth one dollar.
The Andrew Johnson dollar coin is worth exactly one dollar.
The name is Sacagawea, and the coin is worth one dollar.
One dollar.
The coin is worth only a dollar.
It's still worth one dollar.
A dollar is worth 100 cents.
It's still worth one dollar.