P.S.: A senator or two giving an interview calling for action doesn't count.
I'm appalled that you think they wouldn't want to and considering the little effort involved in debunking the trollfest on these threads (wonder where it came from) why no one should be careful.
Why would "the government" or "the banks" wnt to shut down bitcoin? Those thinking startegically about a possible loss of power due to bitcoin replacing fiat currences most likely do not see bitcoin as a real threat yet: They won't act unless bitcoin becomes a real problem for them (if they cared for every little project that showed some potential there'd be a thousand things they's have to fight at once).
What we see now is two senators discovering something that can be connected to drugs, noticing that no one else tried to turn it into political profit yet; they just grab the opportunity to appear "tough on crime".
I do think that some governments will try to take action against bitcoin at some point in the future, and so will some banks. But I do not think that there are any governments or banks actively fighting bitcoin today.
If bitcoin fails today, it is not governments or banks winning a fight, it is bitcoin failing without any action from governments or banks.
Philipp