Senator Elizabeth Warren, a prominent critic of the cryptocurrency sector, has raised significant concerns regarding the Office of the Comptroller of the Currency (OCC) and its approval of charters for nine crypto-focused firms, including Coinbase and Ripple. In a letter addressed to OCC chief Jonathan Gould, Warren argues that these companies are being allowed to operate under narrow trust charters that do not impose the same regulatory standards as those required for traditional banks. She contends that this regulatory loophole enables these firms to function as 'crypto banks' while evading essential safeguards, thereby posing risks to consumers and the overall banking system. Warren has previously criticized Gould's decisions in congressional hearings, emphasizing the need for transparency in the chartering process. She has also requested documentation regarding any communications between the OCC and President Donald Trump related to these approvals, particularly concerning World Liberty Financial Inc., a crypto company linked to Trump. The OCC has yet to respond to her inquiries, which could have implications for the future of crypto regulation in the U.S.