Cryogenics is uncertain but people still hope that they may return to life.
James Bedford, a World War 1 veteran, died in 1966 and chose to be frozen in liquid nitrogen in in the hope that he could be revived, once a cure was found for his ailments.
Bedford’s body will remain frozen as long as funding for that purpose continues, according to FOX News in "After 50 years, frozen WWI veteran's body awaits reanimation."
The science behind freezing and reanimating a human body is considered to be dubious by most experts. Although researchers were able to freeze and reanimate a rabbit brain recently, most do not think it will ever be possible to do something similar for a human body.
People who are interested in the procedure are still able to have it done for themselves after they pass away. However, they should do so with the understanding that it might never work. The process is expensive, too.
Reference: FOX News (Jan. 18, 2017) "After 50 years, frozen WWI veteran's body awaits reanimation."