It's not about predicting the future, which is impossible. It's about being prepared. I was one of the original preppers. I was a boy scout and remember our motto, "Always be prepared".
What is needed to be "prepared" for a full on SHF.
Someplace to go that is well off the beaten path, preferably underground.
Someway to get there that doesn't attract undo attention and yet can be defended or outrun whomever is chasing you. A hard combination to achieve.
Enough ammo to last quite a long time, you don't want to be out and about scavenging because everybody else will be too.
Ammo stashed between where you live and where you are going.
At least 1 year of nonperishable food stock
Something to keep your mind busy for at least 6 months while you are bunkered in.
A manual generator to run a radio of a light or charge batteries
A water purification system
A large stock of alcohol which can be used for many things and will be worth it's weight in gold for trading if things ever settle down that much.
Serious first aid kit. Everything from broken bones to sucking chest wounds. Nobody else is going to take care of you.
Full 4 season wardrobe. Having a fire or chimney smoking just gives away where you are.
And that is just the start. If you can't do the above just stay home and watch with the rest of us.