The U.S. Supreme Court held that inherited IRAs do not qualify for the section 522(b)(3)(C) exemption.
That opinion makes clear that a beneficiary faces a choice between (1) "rolling over" the IRA, thus making the IRA subject to the tax and bankruptcy rules for traditional and Roth IRAs, or (2) keeping the IRA as an inherited IRA subject to different tax and bankruptcy rules for inherited IRAs.