I heard that some small and developing countries are trying to launch their own coins to benefit their own country and avoid sanction from big countries like USA or Russia. This Nigeria coin might be true but need some more proofs.
Coins can now be bought at the exchange
https://beta.wavesplatform.com. While a little and for WAVES. You can check how it works.
If there are any, I can create warrants for sale in Bitcoin and other altcoin.
In order to see the Carat / WAVES exchange, enter Carat in the search field in the list of Crypto-currency and select it.
You will see
http://prntscr.com/iumolc