I'm very excited about Bitcoin too, it feels like a renaissance for almost every vertical. Especially since there's so much low-hanging fruit right now and there's still a disconnect between these units of cryptocurrency and real hard cash in people's perception. You can get people used to doing things with Bitcoins what they normally wouldn't do with "real money".
Yes, you can invest in bitcoin microcorporations that started their IPO on the Global Bitcoin Stock Exchange.
However, these corporations are not legally declared or chartered by the state. They only exists in the mind of some bitcoiners.
For some reason, Bitcoin unlock the mind of hackers and encourage them to go wild and do crazy things like creating companies that exists only on...cipherspace.