Only as long as you manage to stay anonymous. Otherwise governments can still confiscate any other assets you have. I don't think there is a master plan to try to control Bitcoin yet, what we're seeing is merely low level bureaucrats involved with combating money laundering doing their jobs. But there will be a plan, and part of it will be to gather as many identities behind Bitcoin addresses as possible. And then to pressure people into revealing the identities behind the addresses they've sent BTC to. This could be done simply by taxing all funds that have passed through a known address until the owner reveals who he's made the payment to, then by adding fines, then taint analysis and blacklists etc etc.