Low Energy Nuclear Reactions (LENR) become more and more  familiar in the scientific community.
NASA's scientist confirms that by using nickel they can produce heat+copper (not radioactive) and by using carbon they can produse heat+nitrogen.
Also  independant research teams from all over the world have reached to similar experimental data.

So, the propability of producing no-radioactive gold with low cost rises in the near future. I will make my speculation more extreme by saying that producing gold may also give an energy-profit when LENR is understood in a deeper level.

I will speculate that in 5-10 years the price (in $) of one 1Kg of gold will reach the price of one 1Kg of copper.

http://www.forbes.com/sites/jeffmcmahon/2013/02/22/nasa-a-nuclear-reactor-to-replace-your-water-heater/

http://www.youtube.com/watch?v=kE3MC5tGBrY