With the biology education I've had I don't think true cryosleep will ever be truly realistic. Closest we could likely get is genetic modification allowing for

With the biology education I've had I don't think true cryosleep will ever be truly realistic. Closest we could likely get is genetic modification allowing for slowed cellular metabolism or allowing cells to enter a dormant state in some way, similar to what we see in some bacteria. Even that might be fanciful imagination but it feels like a more promising approach to me.