The Ghanaian Cedi has been the currency of Ghana since 1965, when it replaced the pre-decimal Ghanaian Pound.
Apart from the regular circulating coinage, the country has also authorised some foreign mints to issue commemorative and bullion coins under its jurisdiction. These are typically in standard bullion sizes, such as one ounce of gold (abbreviated as 1 oz Au, where "Au" comes from the Latin word for gold, Aurum).
The Mint says about this coin:
Scottsdale Mint is excited to announce the latest from our mint, the 2021 Ghana Alien 5 Coin Program.
The possibility of extraterrestrials visiting Earth has always captured our imagination. From books and movies, to homemade videos and rumours, there’s widespread excitement surrounding the possibility of otherworldly beings. NASA just recently released footage of UFOs and people are hearing strange noises all over the world. What if there were visiting creatures from space that wanted to trade? What would they use for currency?
Introducing the first of its kind, the Ghana Alien Coin. This is the ultimate coin series for fans, featuring a space-inspired design and UV ink revealing a glow in the dark message only “they” can see.