Some governments (like El Salvador and Russia) are moving into bitcoin mining. If more nation-states accumulate BTC, what impact will this have on decentralization and price stability? Could this lead to geopolitical bitcoin wars?
Do you have any evidence that the Russian government is investing in BTC mining? I find it hard to believe that the Russian government would invest in Bitcoin mining. The Russian government is currently "investing" in tanks, rockets, weapons and artillery shells.

What impact could this have on the BTC price? It would most likely pump the price, but I find it highly unlikely that the big and developed countries would suddenly start mining Bitcoins.
Geopolitical Bitcoin wars? Are you kidding me? The countries would start wars over rare-earth minerals, oil, gas or water, but they won't start wars over the possession of Bitcoin or any other cryptocurrency.