Russia is considering shutting down the internet connection to the rest of the globe. What will occur? Is the hash rate decreasing? What will happen if the connection is re-established in a few years?
Not sure about other cryptos, but least in the case of Bitcoin.. You need neither grid power nor internet. Battery backups, solar power, hydro power, distributed nodes across the whole world that can broadcast across satellite or even radio waves. There are alternate ways to access it.
Bitcoin is increasingly attractive because it can adapt to conditions and needs, this is what makes us never worry about the future of bitcoin, even when the war is then bitcoin is always attractive than fiat or other assets, bitcoin will continue to be valuable and attacks on bitcoin never succeed until now.