The biggest demand for Bitcoin right now is store of value. Growth of price makes it raise even higher. Price will rise much higher when countries will start buying in.
Are you referring that governments will start to acquire Bitcoin just like they do so with gold to increase their reserves? Theoretically this could be possible, but there is no way for us to find out until they publicly announce that. Japanese authorities technically hold +100,000 BTC from MtGox, and Bulgarian authorities have said to own around 200,000 BTC, which I personally find very questionable.
Yeah, I too am unsure about Japan or Bulgaria hoarding BTC. I have heard that North Korea is accumulating BTC, but again, not sure of the validity of that. If governments do start to accumulate Bitcoin to increase their reserves, then the price will definitely reflect that. If more people adopt the ideology of BTC being a store of value (already has great store of value properties) then governments will for sure start to accumulate BTC. Just a matter of time I guess.