Find another person who accepts Bitcoin and do business with them. Neither of you has to exchange to rubles to participate in the economy. At some point the fl

Find another person who accepts Bitcoin and do business with them. Neither of you has to exchange to rubles to participate in the economy. At some point the flow does have to exit to something that a corporation or ministry controls; so an exchange business will necessarily appear, even if it's extremely high risk; someone will be in a position to pull strings. It's not a stretch when you look at how countries with weak local currencies have been operating for decades, just usually with USD as the preferred trade currency instead.