This is one: https://www.secondmarket.com/company/bitcoin-investment-trust https://www.secondmarket.com/company/bitcoin-investment-trus... There may be more. I

This is one: https://www.secondmarket.com/company/bitcoin-investment-trust https://www.secondmarket.com/company/bitcoin-investment-trus... There may be more. I remember reading about the Winkelvoss' trying to do something similar.