So if bitcoins are handled correctly, without any illegal activities and everybody pays their taxes on them, then I am sure that no government would have something against the use of a cryptocurrency.
Unfortunatelly sometimes someof the things I mentioned are not fulfilled completely by a few users.
That one reason why governments are suspiciously against cryptocurrencies.
Yes that is a possibility that government will create their own coin on which they can have total control like fiat money and which can give tough competition to bitcoin in future and if it will hold good features then people will surely switch to that coin.
I don't think it is possible because already many country govt is thinking to accept this Bitcoin as a legal currency. And recently also one country agreed with this Bitcoin. So slowly one by one country may accept this Bitcoin. This is also possible am I right. We should think about both positive and negative. But I think the govt will not take risks to create a new coin.