It's quite similar to currencies but I'd like to mention possible use of bitcoin for equities market.
A company would modify the bitcoin software to create its own cryptocurrency. The total amount would be much lower, so that the company could make it possible to own the whole initial stock (running the software alone during some time before realease, for instance).
To what end? A digital stock cert is easier, and doesn't require a timestamp. Anonymous ownership of stock is risky for the investors, and illegal in most nations anyway. Anonymous "bearer bonds" are also banned in most nations, due to a history of their use in money laundering and finanacing of wars.