What's 'life', what's 'death', what's 'being real'? Contemplate the physological process of death. You become unconscious and your heart stops beating, yet the engine of your mind, your brain, stays functional and you may enter a dream state.
Within your dreams, time itself becomes a tool of your mind -- you can spend days, weeks, months, years, centuries and millenia in a dream, while in what you believe to be the "real world" a fraction of that time passes. Now, when parts of your brain start to die off as a consequence of oxygen deprivation, the faculties of your mind dissolve and the dream with it.
It may intermittently turn into a nightmare, but ultimately becomes abstract and incomprehensible. If you narrated the change you're perceiving, you'd not just struggle to find words to describe it, you would gradually lose your ability to speak and think entirely. Eventually you'd become silent, oblivious to what is happening and to what you are, have been and will be -- you'd lose your cognition and then eventually your sentience.
Nothing stops this process from turning into a comvolution, from playing out over and over again within your dream-realities. Between your the "start of your death" to the "end of your death", you may live infinite lives.
If you had choose a dream, which one would you cling to? What's your personal metric, based on what would you choose the dream? Potential for or actuality of experience?