A crowd in a dream often reflects social pressure -- the sense of being judged, compared, or swept along by expectations that aren't entirely your own. Feeling lost in a crowd can point to anonymity, either a relief from being seen or a fear of not mattering. Finding your footing within a crowd usually mirrors a growing sense of where you belong, and on what terms.
In matters of secrecy, let not the Moon be combust, but going from combustion. - William Lilly (1602.-1681.)