Investment contracts aren't inherently tradeable. They may frequently be tradeable because of market preferences, but it is not inherent in the category.
«an "investment contract" exists when there is the investment of money in a common enterprise with a reasonable expectation of profits to be derived from the efforts of others.» [0]
Could you give me an example of an investment contract that is not tradable? You have me straining at the imagination here.
Even if you are right that tradability is not a requirement of a security, and even if you are right that this meets all of the requirements of a security, I still don't see how the SEC has jurisdiction here. The Securities Exchange Act explicitly exempts bank notes with duration of less than 9 months from SEC regulation. Interest bearing bank accounts have the unique feature that they have no required investment term: you can deposit for a century, or you could deposit for a millisecond...the interest is paid for the duration of the deposit, and the duration is entirely determined by the depositor, and is not a term in the contract. The SEC admits that even short term CD's (undoubtedly an investment contract that passes the Howey Test for a security) do not meet its legal bar for jurisdiction, so why they would try to apply it to a unrestricted withdrawable account (regardless of the underlying asset class) is absurd to me.
> The Securities Exchange Act explicitly exempts bank notes with duration of less than 9 months from SEC regulation.
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.]»
> but shall not include currency or any note, draft, bill of exchange, or banker’s acceptance which has a maturity at the time of issuance of not exceeding nine months, exclusive of days of grace, or any renewal thereof the maturity of which is likewise limited.
It is not required for it to be issued by a bank for it to be exempt.
Howey itself did not concern commercial paper, so if the Howey test only applied to that, it would be nonbinding dicta.