I assume you don't literally mean what you asked, so I will assume you meant to ask: Why did they make a one dollar coin? And the answer it durability. A paper bill doesn't last as long as a metal coin. How many dollar bills do you see from the 1980's? How many coins do you find in circulation from the 50's and 60's? Coins just plain last longer.
1 Dollar.
3 quarters 1 dime 3 nickles
1 dollar
1 dollar
1 dollar
The coin is just a dollar spend it.
Ireland does not use the dollar and never has, so there is no such thing as an Irish 1 dollar coin. Ireland was using the pound in 1952, but there was no 1 pound coin. So whatever coin you have, cannot be either an Irish one dollar coin nor an Irish one pound coin from 1952.
1 dollar
silver dollar
If this question is about the coin's value, it's worth one dollar.
The US did not make a gold dollar in 1894. They stopped production of the gold $1 coin in 1889.
1 dollar