So far I think its only people or organizations that are trying to create a new crypto currency to just be out there and maybe one day compete with bitcoin. But what if a government decides to create a country's own and legit altcoin? How would that affect the whole scenario? Will it be an instant success, especially if the country is big enough in population or has decent enough international trading going on.
No it will not be an instant successful although the country are big enough in population or has decent enough international trading, due to bitcoins was need a lot of time up to there are many users and the new coin will be considered as other altcoins that can become scam coin.