This would be hard to achieve for most people. Maybe it can be done with 50 5 gallon pails of rice and 50 5lb pails of beans? Canned food would only be good for a year or 2.
I personally have a few pails of rice, bags of dried beans, and a hundred cans or so of various soups, beans, chicken, tuna, etc. Lots of pasta. I think my reserves can last me 6 months if we eat frugally.
The issue is water. If the tap turns off I'm either drinking rain water or something from the river. I don't know how well a Brita will filter dirty water or how long 1 filter will last. Boiling would be hard as well with no electric or gas. Propane tanks will only last a few weeks depending how many you have. I'd have to setup a caldron and boil water over a camp fire.
City folk are in much worse shape than those in the country.
I think this reality of cyberattacks, as OP stated, or some kind of other disruption is very likely for multiple reasons.
- We are involved in multiple engagements from the Red Sea to Ukraine, and who knows what else. A state actor or lone wolf might want to cause a disruption to focus our resources on domestic issues.
- A cyber event coordinated with damage to hard to replace electrical transformers and a radiological disaster would definitely make C-19 look like a non event.
- Though this may be a crazy theory, destabilization before an election might be another way to postpone it. Elections are not federal so the President has no official say in the matter and the Constitution does not have a provision to postpone elections. Electors from the states decide who the president is so the way an election can be postponed would be to have a majority, if not all states, agree not to send the electors out. IMHO red states would be the most likely to destabilize as to avoid their say in the matter and prevent local elections.
All the above scenarios are fringe theories at this point but strange things have been happening lately, polls are not looking good for team blue, and the world is going through a complicated phase right now. I hope nothing happens but if it does, it won't hurt to be stocked up with food and fuel.
p.s. Add some medications to your supplies. Ask for extra refills and don't throw anything out even if it's old. Antibiotics are still good after they expire, you might need to double up on the dose though. Insulin would probably be no longer available. Learn how to live without it if possible by adjusting your diet.