The aim of this article is to describe the factors that determine the types of ground states in crystals with localized electron pairs, or bipolarons. We consider the concentration of the electron pairs and parameters describing the lattice polarization due to the bipolaron-phonon interaction, together with parameters for the possible ground states. All the parameters and the bipolaron concentration must be self-consistently related. The conditions that favour the disordered and superconducting states, and the charge-ordered states, of such crystals are presented.