Wow. So much hate on here.
In all seriousness, a government CAN destroy bitcoin, just like they can destroy ANYTHING. Thinking they can't is foolish.
Propaganda can spread popular opinion. All a government needs to do is release news bulletins in the AP that are picked up by newspapers which equate bitcoin to something nefarious. It doesn't matter if it's true or not. The more people believe something, the more it becomes true.
In order for bitcoin to become more successful, more people need to use btc. If government keeps slamming it, most of us here will know they're lying - but it will be impossible to spread the word to the majority of people if they just get their information from the newspapers.
It takes a concerted, planned effort by a government to slowly release more and more news articles that equate bitcoin to something bad. They can't outright say a whopper of a lie, or there will be a big pushback. They need to plan and slowly spread little pieces of bad information at a time, until there is nothing really crazily contridictory that people will care to think of it as a scandal.
This is similar to how the republican party in the united states acts. They have half of America believing there is no global warming (either man-made or not) and to think everything scientists say is a lie. This has been 20 years of propaganda that the republican party is winning.
The US can destroy the earth if they want, by sending all their Nuclear ICBMs at somewhere on earth.
The OP is talking about some government launching a 51% attack on a coin.
@ Byt411
Its not Alex, its Mr Autistic that you wanted to quote.
Sorry Alex. I will fix it now.