In this 2020 Ask My Anything Video, Elon Musk is asked about cryonics. In a nutshell, Elon answers that if the brain is frozen quickly

Reports in the popular press that “humans have been placed in suspended animation for the first time” have been widely circulated by advocates of cryonics.

“It is a strange matter of fact that those who watch and admire scientific research from the outside frequently have more confidence in its results