Interesting. I think it makes much more sense to create a national blockchain, spawn a good number of "russiacoins" at initialisation time, choose its own growth rules.
Once you've done that you can open your exchange which accepts rubles and delivers RBTC, maybe at a 1:1 parity.
You might need to write some rules allowing you to create RBTC during the exchange period, because you don't know how much rubles people will come and exchange at your desks.
Once that is done and the exchange period is over, you are now in a country where the ruble has been crypto-currency-upgraded, but it is still a national currency, with legal tender inside the country, but with no special international status.
Do you think this scenario is flawed ?
If not, wouldn't the first "national crypto currency" gain international credibility ? I guess a lot of investors, knowing very well that the Fed is more or less a giant printing press, would be happy to sell dollars and buy this new currency, wouldn't they ?