One way that bitcoin would die would be if another type of online currency became so successful that it makes people completely ignore bitcoin.
The "death" of bitcoin is probably a scenario more easily achieved than the death of cryptocurrency. Even with current rates of crypto adoption, it's unthinkable that crypto will one day fall out of use. If "death" simply means transition to another form of crypto rather than complete disuse, then this will happen naturally and inevitably as technology progresses and improves.
As long as the whole sphere progresses, then one coin is meaningless. But I doubt btc will be the first to falter, it's too well known at this point.