I had covid once, and I was vaxed shortly before getting it. I'm about 99% sure it would've been much worse for me if I didn't get vaxed. When I got it, the only symptom I had was a light fever for about 3 days, no other symptoms.
Let's look at the definition of smart. "Having or showing a quick-witted intelligence." I'm not the smartest person in the world, but I would say no - simply reading books will not increase the ceiling to most peoples "smarts". Kinda like saying "everyone should eat steak and you'll have more muscles the next day because there's protein in there".
This is why rich people are rich. They pass on generational wealth, instead of spending all their money on traveling, christmas outfits for dogs, and bric-a-brac.
According to everything i've ever read, we would die long before our sun burned out. Once it starts increasing in size, our oceans will boil. Though, that is half a billion years from now (give or take).