The start of "de-dollarization" by Russia

In 2016, next to China, Russia was the second largest buyer of gold. For what purpose?

Is this the reason? To replace the dollar as the #1 world currency? The dollar replaced the Sterling before.

I have attached the link here for anyone who is interested about this. 

http://anonhq.com/russia-leaving-global-banking-system-dumping-us-dollar-for-gold/

http://america.aljazeera.com/articles/2014/5/20/russia-china-bankdeal.html