Maybe the answer is more than one. First possibility: Definitely not, you as your present form is not permanent. So individual soliptism is out. However, since everything and everyone is ultimately One, then in a certain way the universal Self is soliptic but is experienced as many. Second possibility is right, if what you say “one self” is the Cosmic Self (experienced as many). Third possibility: Also true but in a relative way! Fourth possibility is really a variant of three (as long as in three we allow for eternal selves) and it is true. In conclusion, many selves are ultimately the One but are experienced relatively as many, as distinct individuals. The latter is the illusion of separation as monism teaches.