If you think carefully you'll notice anything has the potential to destroy Bitcoin, but not anytime soon (hopefully). As far as I am concerned, the best plan to stick with would be to simply just focus on more tactile moves in terms of growing and strengthening Bitcoin, rather than focusing on what could kill it it. 
That's true we should take things positively rather then focusing on negative things, as we would find more negative people around us who are continuously busy in taking negative things related to bitcoins, and I don't think any individual or a system holds that power to destroy bitcoin.