  Till today, the nature of Dark Matter (DM) remains elusive despite all our
efforts. This missing matter of the universe has not been observed by the
already operating DM direct-detection experiments, but we can infer its
gravitational effects. Galaxies and clusters of galaxies are most likely to
contain DM trapped to their gravitational field. This leads us to the natural
assumption that compact objects might contain DM too. Among the compact objects
exist in galaxies, neutron stars are considered as natural laboratories, where
theories can be tested, and observational data can be received. Thus, many
models of DM have proposed it's presence in those stars. In particular, in the
present study we focus on two types of dark matter particles, namely fermions
and bosons with a mass range of [0.01-1.5] GeV and self-interaction strength in
the range [10$^{-4}$-10$^{-1}$] MeV$^{-1}$. By employing the two-fluid model,
we discovered a stable area in the M-R diagram of a celestial formation
consisting of neutron star matter and DM that is substantial in size. This
formation spans hundreds of kilometers in diameter and possesses a mass
equivalent to 100 or more times the Solar mass. To elucidate, this entity
resembles an enormous celestial body of DM, with a neutron star at its core.
This implies that a supramassive stellar compact entity can exist without
encountering any issues of stability and without undergoing a collapse into a
black hole. In any case, the present theoretical prediction can, if combined
with corresponding observations, shed light on the existence of DM and even
more on its basic properties.
