One questions i have thought of is with all these banks looking into blockchain technology for there record keeping ect, and knowing they can use there own version of the blockchain (centralised) may this be how bitcoin will kill itself?
Bitcoin is driven by passion and processing power. The passion will not die, though it may be split. The processing power will continue with the passion. So I find it highly unlikely that Bitcoin will "kill itself." Let the banks start their own versions. Each chain will have it's own meaning, and I suspect the chain with the least regulation for the most protection will thrive the most.