I don't think it is possible for Bitcoin to loose all its value as many people believe in Bitcoin and they have invested their money in it. Bitcoin is only growing and gaining popularity everyday so we can only expect growth from it. Minor pumps and dumps may be possible.
Bitcoin lose its value? I will say yes it can be a possible thing to happen. But guess what? Bitcoin have always found a way to recover. A digital currency with the largest community, and that makes it able to achieve anything, if the people work together.