Selves come and go, as brains come and go. And at the subjective, human level what this amounts to is a continuous state of 'being you.' 'You' don't have to worry about dying, because the moment you stop being associated with a particular brain and a particular narrative, the feeling of being you reemerges in a new guise. It has happened before and it will happen again. And it is not a case of you becoming someone else in the traditional sense of transmigrating souls. We have to see that 'being you' is just a general phenomenon. There is no actual, objective link that determines who you will become. You will not become anyone. There is just a continuously experienced condition of you-ness.
David Darling, Zen Physics: The Science of Death, the Logic of Reincarnation