It's not impossible: https://www.quora.com/Will-the-star-Betelgeuse-become-a-black-hole
It's not impossible: https://www.quora.com/Will-the-star-Betelgeuse-become-a-black-hole
It's not impossible: https://www.quora.com/Will-the-star-Betelgeuse-become-a-black-hole
So... was 640 years ago. For all we know, it's already gone and is a black hole.