That is something that nobody knows and is almost impossible to predict. I think that when bitcoin is going to die that we are going to notice it before it actually is going to happen but right now I do not notice a thing.
Bitcoin will survive for at least two decades, and it will not die soon, as more people and businesses are entering into it which will take bitcoin to higher level.
The bitcoin will evolve and adapt to the new environment. So it will survive much longer, it might be there forever.