Governments cant destroy bitcoin.
1.) They dont have the hardware to gain it themselves (supercomputers my ass).
2.) Since BTC Raised over 110 yesterday, they cant afford to buy them in mass anymore.
3.) People wont sell BTC cheap anymore, its raising and raising.
4.) Even if finance authorities want to control BTC, they could never get a hold of transactions at all.
5.) The amout of Bitcoins is limited, therefore you cant melt it with any fiat money system (no inflation/interests).
And even "if" the Bitcoin system was in danger, it would take a week, maybe 2 weeks - and those dangers would be fixed.
If necessary - within a new BC system - thats the way to go, no one shall be able to stop it.
governments destroy by regulating. like the poker sites.....