Robinhood ecosystem meme coin MOO briefly exceeded a $40 million market capitalization and was reported at $42 million, according to GMGN data cited by Odaily. MOO is an RH on-chain stock meme coin traded through the MOO/MU pair, which is directly paired with tokenized Micron shares on Robinhood Chain. Meme coins can experience sharp price swings and are sensitive to market sentiment and trending events, Odaily said, urging investors to consider trading risks.