“Since late 2013, PENSCO clients have been able to use their retirement funds to purchase bitcoin via the Bitcoin Investment Trust (BIT). The BIT is a private, open-ended trust that is invested exclusively in bitcoin. The BIT is sponsored by Alternative Currency Asset Management (ACAM), a wholly-owned subsidiary of SecondMarket Holdings, Inc. and is audited by Ernst & Young. Another potential way PENSCO clients can now use their retirement funds to purchase bitcoin is to establish a legal entity, such as an LLC, and to invest in bitcoin through the LLC. This would allow individuals to hold bitcoin as an investment, while also leveraging the tax-advantaged status of their IRA accounts.”
http://finance.yahoo.com/news/pensco-provides-self-directed-ira-141100087.html