The answer to this question is tricky, the talk about going back to gold standers was firstly raised by researchers in late 90,s and early 2001, but still nothing major happened till now.
In my resent (in 2014) calculations of the first highest 51 countries’ gold reserves in the world that about 48% raise there gold reserve after the crisis of 2008. So it’s actually the fear of crises and wars that make nations think about going back to gold.
Other major fact is that as long as the U.S dollar is linked to oil sales the dollar will stay as a very good reserve to hold by different countries and will hold back the thoughts about using gold standers.