RussiaCoin
Here's the formula for Russia to get around the monetary sanctions. Other countries won't do this, because they are in fear of the US sanctions. But Russia, being in the middle of it already, won't be hurt if they try.
1. Russia > Start a national Cryptocurrency called, say, RussiaCoin.
2. Make their blockchain not dependent on mining and miners.
3. Rather, increase number of coins by offering every person who makes a Ruble purchase in every Russian store in Russia, the same number of free RussianCoins as the amount of Rubles in the purchase.
4. The value of the RussianCoin must be set so it can never drop below the Ruble, but can increase to any value above the Ruble.
5. Since they are free, many Russians will accept them.
6. Russia > Make a Russian Crypto Exchange that can trade any CryptoCoins, including the RussiaCoin, and...
Watch what happens. Instant black market, with many poor people around the world, with an inflow of many Altcoins into Russia, and a gradual breaking of the sanctions, and increase of the Ruble value. Alternately, RussiaCoin might become the new world currency.