I see government control over money as basically an immovable object - I don't think so-called constitutional protections mean anything when it comes to governments doing what they feel is necessary to maintain control. Internet freedom and encryption are not as much of an irresistible force as net-romantics would like to think.
If anything can force governments into legislating backdoors into all encryption systems and creating a clearly established set of "choke points" for control of data flows, it is the possibility of Bitcoin and other crypto-currencies to render basic imperatives of the modern nation state impossible to enforce.
It is more or less infinitely depressing to me, because as much as I would like to believe that the "good guys" are going to win, I doubt it. People generally don't realize how much we are already living in a dystopian panopticon, and Bitcoin is one of the rays of light shining through the cracks in the prison walls.
What is even more depressing to me is my own cowardice. I am too scared of the US government to even try to resist in any way, no matter how trivial. I would like to participate in Bitcoin and other projects, but I don't want to end up in a federal prison for conspiracy to assist in money laundering and tax evasion, as I imagine that any participation in Bitcoin will be interpreted by government prosecutors of the near-future.