Now & After 6 years from the creation of Bitcoin by Satoshi Nakamoto , what's the worst case scenario that could happen to Bitcoin and make it dissapear once for all in your opinion , personally I guess it will be little bit hard to get 3 billion USD market-cap business destroyed just like that .
The worst case scenario is that bitcoin falls to such a low price that mining becomes unprofitable and the miners pack up. That would be the only death blow really. Even if bitcoin doesnt go fully mainstream I think it will survive as an alternative payment system even if the only thing people are buying with it are drugs.