Somebody should set up an investment fund the other way to allow participation in bitcoin via the normal stock exchange. That could bring a huge pile of money into the system and into the pockets of whoever does it first.
Well, again, brokerages are a regulated activity. I don't know what would stop a brokerage from accepting bitcoin as a funding method, but for now, none do.
There have been some developments though.
BitcoinOPX plans to offer options (only as cash-settlement / Contracts-For-Difference):
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http://www.bitcoinopx.comListed, however, are options markets for stocks like GOOG, FB, AMXN, etc.
