Senator Elizabeth Warren has intensified her scrutiny of the crypto sector, criticizing the Office of the Comptroller of the Currency (OCC) for issuing national trust bank charters to digital-asset firms. In a letter to OCC head Jonathan Gould, Warren highlighted that at least nine charters have been granted, some conditionally, which she argues exceed the legal scope intended for such charters. These charters allow firms to manage customer assets, potentially speeding up payment settlements. Warren expressed concern that these charters, originally meant for narrow custody roles, are being used to enable broader activities, potentially violating the National Bank Act. She cited firms like Ripple, Circle, BitGo, Fidelity, and Paxos as recent recipients of these approvals. Warren warns that crypto firms might be positioning to expand into bank-like services such as lending and payments without adequate regulatory oversight, posing risks to consumer protection and financial stability. The OCC, however, defends its approach, with Comptroller Jonathan Gould arguing that integrating new entrants into the federal banking system can enhance competition and modernize services. This regulatory tension highlights the ongoing debate between innovation and oversight in the crypto industry.