How many shops will be open without power? No till, no light, no refrigerator... not sure how much will help you having cash, beyond a couple of very basic needs - I can't even tell which, nor can you, it's gonna be an adventure either way.
Fortunately PV and wind and local batteries are getting deployed everywhere fast and electric trucks are starting to become a thing. Some places might even have enough for basic logistics in a war that cuts out their oil supply like wars tend to because they're obvious weak points.