The OCC published Interpretive Letter 1183 to confirm that crypto-asset custody, certain stablecoin activities, and participation in independent node verification networks such as distributed ledger are permissible for national banks and federal savings associations. The letter also rescinds the requirement for OCC-supervised institutions to receive supervisory nonobjection and demonstrate that they have adequate controls in place before they can engage in these cryptocurrency activities.
Seems good? (Trying not to be a bitcoin hipster.)