The benefits to the average person are obvious.
Evil Hackers won't even want to destroy it because if widely adopted it will make it even easier to get away with than stealing cc info.
I really think that even the governments and central banks will be in favor of bitcoin adoption.
Governments because the average person is never going to be anon, and it opens up taxing of things like paying someone to mow your lawn. In addition, the value to intelligence agencies such as the CIA has been mentioned many times. Plus they will think that if need be, they can always fork the chain into some horrible mark of the beast thing where people are shunned from making transactions. I think this would fail, but its possible.
Central Banks because they know the games they are playing and the risks. They know it will be good to have this alternate currency and infrastructure out there in case they mess up. In the meantime they can just manipulate it with their supply of infinite fiat currency. I mean read about this thing:
https://en.wikipedia.org/wiki/BancorThe tool is just so useful, I just can't see significant resources being devoted to its destruction. Competition maybe, but not destruction.