Population migration to the universe

I'm sorry to tell you that with the current level of human science and technology, if the end of the world comes, human beings will not go anywhere. Because humans have no ability to migrate to other planets. And so far, astronomers have not found a planet in the solar system that is as suitable for human survival as the earth, even Mars. Farther away, it will enter interstellar space in light years, which is even more elusive for human beings! Even if such a suitable planet can be found in the future, it is extremely difficult for human beings to realize their dream of moving to other planets, because it is technically impossible and impossible to realize large-scale interstellar population migration! And most of the rest will have to die on earth.

According to the above, I think it will never be possible for human beings to emigrate billions of people to other planets, and only a few people will engage in scientific research and related experiments there at most.