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
@Madken65 Humans aren't bears. If we were we'd calorie load for Winter but in Spring, refuse to do the stuff necessary to take the weight off. Plus, our Circadian Rhythms aren't wired the same. For example, some people get headaches from oversleeping.
Genetic Engineering...A Cure-All once we get past all that sticky morality.