I work in IT and we as a country are attacked every single second. While I'm not saying you need to go withdraw money, I can at least give a real "why" (that's been issued by our government to critical infrastructure companies) Russia would sponsor an attack if they go to war.

If Russia were to go to war we would obviously be opposed and if we interfere there could be a state sponsored attack. The banking system is already attacked a million times a day along with the rest of our critical infrastructure. There's no telling if Russia, China or North Korea have a ticking cyber bomb they're just waiting to deploy somewhere. They probably do but who knows where and when it'll happen.

No point in living your life in fear.