While more governments are accumulating Bitcoin, I don't think it's reaching the level where countries will go to war over it. There are more important things that countries would fight over, like uranium, oil, and other strategic resources, and I don't think Bitcoin is at the point where it's so important that countries would fight over it.
There's no reason for countries to go to war over Bitcoin. If it's about potential profits, they can get that from other sources, so there's no need to go to war over it.
You are correct because in case of conventional wars, wars are always fought about physical thing that you can touch such as land, oil, water, and power. Bitcoin is not such. It exists in internet and no nation can adjust its code or steal it with dropping of bombs. There is no sense going to war and seize Bitcoin since a country can simply purchase it or extract it with help of their own electricity without having to fight a war.
Nations may not send tankers and soldiers, but they will wage war with trade regulations, computer hacking and financial consummation. It does not concern struggle on profits, it concerns possession of new economic system of the world. Bitcoin is not going to make powerful countries engage in literal war but it will certainly alter the manner in which economic games are played amongst the powerful countries.