If the whole premise of its autonomy rests solely on it's ability to engage in metered economic exchanges by way of some kind of bitcoin-style protocol, then an "autonomous corporation" MUST, by definition, persist on a distributed global network of continously available computers. So, if this entity has that dependency, then who's providing the hosting?
He who opts in on hosting the protocol, carries a say in the fate of the entity, thus this is no more "autonomous" than any other body of distributed human decision making. Whether it be voting, the purchase of publicly traded shares, or the organization of a bond to fund a bridge to nowhere.
It comes down to this: In order to mine bitcoins, or rather, add value to the system, you have to be constantly connected tothe internet. You can't mine a bitcoin in isolation. You can't power up a stand-alone, air-gapped machine, and mine bitcoins and expect them to have value when you connect it to the internet.
If you can't mine your own bitcoins in a vacuum, then very obviously, this requires you to interact with the world at large, over public networks. Those other systems must be available and complicit in such activities. That certainly doesn't fit my definition of "autonomous" in the sense of some massive force-of-nature style artificial intelligence boogey man. These systems need to be switched on, activated and tended to by someone. Someone will eventually want to extract value from these economic crypto-currencies.
So, here we are, coming back to the drone/remote control debate. Is a drone really "autonomous" when there's a pilot manning a set of remote controls from a bunker? Similarly, is this truly an "autonomous" corporation, when there are people deploying agents onto client hosts and services onto servers, all with the goal of gaining wealth? However you want to encapsulate the skill sets involved, that still requires expertise, and human intervention in my book, and certainly doesn't sound autonomous at all, to me.
Autonomy is a relative term. Whose autonomy are we talking about, here? And autonomy from "what" precisely?