Russia Bans Bitcoin, Halts Cash Withdrawals Ahead of Winter Olympics

This is pretty interesting (and sinister stuff).  With the Winter Olympics coming to town, Russia is making some strange moves that have many in conspiracy circles wondering what they are up to.  Russia has halted cash withdrawals from banks and also completely banned Bitcoin.  Is this a power play to try to get some traction with so many international visitors coming in for the Olympics?  Or do the Russians have foreknowledge of an impending global financial crisis?