MOO, a meme coin associated with the Robinhood ecosystem, reached a market capitalization of about $5.4 million after rising 931% over 24 hours, according to GMGN data. The token is described as an RH Chain on-chain stock meme coin, with the MOO/MU trading pair directly linked to tokenized Micron stock on Robinhood Chain. Meme coins can be highly volatile and sensitive to market sentiment and trending events, creating substantial trading risks.