be sure nothing can destory Bitcoin

I dont think so, bitcoin exchanges and its price depends on how does the user function in this ecosystem, then we can conclude that the user can be a factor if bitcoin lose its capability to function well.. If the price of bitcoin continuously deflates maybe at some time, investors will start seeking some other way how can they be profitable which may affect the bounties that we can join, they will be limited , so I hope so bitcoin doesnt deflates so much in iys prices continuously grow its users.