National trust charters pushed crypto custody into a broader regulatory clash as U.S. Senator Elizabeth Warren pressed the OCC over approvals tied to

The Senate Banking Committee's top Democrat sent a letter to the Office of the Comptroller of the Currency questioning the charters of nine crypto firms.

Last year, the OCC granted conditional approvals to Circle, Ripple, BitGo, Fidelity, and Paxos, as well as other firms more recently.