You need to be more specific. There have not been any gold dollars released by the US Mint since 1889 for circulation (minus some minor collector editions before 1933) and there are no gold dollars dated 1978 struck by the US Mint. Instead you either have a gold plated 1978 dollar coin (which would just be worth $1) or you have a dollar coin issued by a different country or private mint.
because of the purchasing power of a particular country is increasing
2009 50 dollar gold piece 1oz worth money value
A 1978-D Eisenhower dollar has no silver in it and is only face value.
it is worth a dick
These coins are NOT rare and are worth face.
It's made of brass, not gold, and is worth one dollar.
One dollar.
One dollar, and there's no gold in it.
A dollar.
It's not made of gold, and it's worth one dollar.
because of the purchasing power of a particular country is increasing
One dollar, and the coin contains no gold.
One dollar, and there's no gold in it.
It is still worth 1 dollar
It's still worth one dollar.
The gold colored Presidential dollar is worth one dollar. These are commonly circulated coins, and contain no gold.
2009 50 dollar gold piece 1oz worth money value