It is quite obvious that in (maximum) few years some of world's Governments are going to start perceiving Bitcoin as a threat.
...
Government will try to stop Bitcoin, that is only a matter of time. We kind of already know that is going to happen since the beginnings, so why so many people are still using MtGox ?
Bitcoin is no threat to anything other than itself, and that damage is so extensive at this point I doubt it will ever be a successful above ground payment system. It has perhaps been a useful prototype for the payment system(s) that will instantly dwarf it there is actually a market for such things.
There is a bitcoin "underground economy" that is likely to persist amongst aficionados. For that matter I think you can still actually do things with Linden dollars ( Second Life ), but if you think bitcoin isn't fully surrounded and contained, I can only say sorry you got to the party so late.