Find somebody who has Bitcoins in your area (localbitcoins might help), give him the fiat money and he sends Bitcoins to your wallet. Pretty easy.
You are a legendary member and replying like a immature, without reading the OP comment just like that commented , it shows that account selling is in peak.
OP for implementing change of fiat currency to cryptocurrency of a country cannot be happen immediately, It has to take time as lot of procedures and other formalities are their , as currently all affairs of the country are running in fiat currency so to change it will take time and first have to test the change and clear the all problems. So it is not possible in a day or two.
I never sold or bought an account and I probably never will.
To me OP wanted to know 'How to change a fiat currency to a cryptocurrency in a Country', which is absolutely clear for me. Question answered.
If OP really wanted to know if Bitcoin one day could replace fiat, he could have asked that, or he could use the search function and join one of the dozents of topics, where exactly this question has been discussed throughoutly:
Will bitcoin replace today's fiat? What are the advantages / disadvantages?
https://bitcointalk.org/index.php?topic=130544.0Will Bitcoin be replaced by another cryptocurrency?
https://bitcointalk.org/index.php?topic=1502768.0OP could also use Google, which brings up hundreds of discussions about the same topic.