I'd probably live the exact same way cause I'd be afraid to waste it and keep it in a bank forever without touching it.
Maybe just less stressed cause I'd feel less worried about the everyday problems(bills and stuff).
You could double your yearly expenses and barely make a dent in the account, I don't see why most people need more.
There's a CEO named Dan Price who made a million dollars a year, now he makes 70000 because he lowered his salary so his employees could make more money. 70 will have their salary increased, 30 of those will have it almost doubled.