First of all, let's take a calming breath. Breath in and out, in and out. The sky is not falling.
Let's examine a few things, shall we? It is true that the recent oil plunge will negatively impact Russia's economy, but in all honesty, it is nowhere near as bad as the oil plunge in late 1980s. While Russia's industrial infrastructure is not as good as USSR, it is also not running a military budget equal to 20% of its national GDP, nor is Russia today constantly deploying a million men force at its border. More important, Russia today actually has major trade partners that are willing to help it. In comparison, the situation at late 1980 was much more grim. Historians agrees that even with all these conditions, USSR only really dissolved because critical mistakes made by Soviet leaders at the time.
Also, remember something else. At the end of the day, a country like Russia is really only in trouble IF the basic living necessity of the people cannot be satisfied, such as food shortage, etc. So far we have not received any indication of this kind of problem. So, in my opinion, Russia will be fine.
To be honest, I am more worried about Venezuela than Russia. Venezuela is pretty much in an all around worse position than Russia, from political leadership, society stability to stuff like industrial infrastructure, food supply, as well as geographical location in relation to friendly trade partners.