  We show that objections raised by Chakraverty $et$ $al$ (Phys. Rev. Lett. 81,
433 (1998)) to the bipolaron model of superconducting cuprates are the result
of an incorrect approximation for the bipolaron energy spectrum and misuse of
the bipolaron theory. The consideration, which takes into account the multiband
energy structure of bipolarons and the unscreened electron-phonon interaction
clearly indicates that cuprates are in the Bose-Einstein condensation regime
with mobile charged bosons.
