No, it is broader than that; it is not limited to bank notes or durations less than 9 months, but to any bank-issued security; but since Coinbase is not a bank as defined in the Securities Exchange Act [0], the bank-issued securities exception is immaterial.

[0] to wit, per 15 USC § 77c(a)(2): «any national bank, or banking institution organized under the laws of any State, territory, or the District of Columbia, the business of which is substantially confined to banking and is supervised by the State or territorial banking commission or similar official; except that in the case of a common trust fund or similar fund, or a collective trust fund, the term “bank” has the same meaning as in the Investment Company Act of 1940 [15 U.S.C. 80a–1 et seq.]»