I don't think we can hibernate for four years though.

Could Humans Hibernate?

Aeon | Vladyslav Vyazovskiy. Examining the concept of hibernation—from why some animals do it to the history of hibernation in literature.

Scientists now agree that hibernation can be of two kinds – a seasonal, multiday profound suppression of metabolism, often lasting for months and occupying a good portion of an animal’s life, or else its shorter and milder form, a so-called daily torpor. https://aeon.co/essays/how-animals-learned-to-hibernate-and-why-we-cant-do-it-yet