There are multiple reasons that will cause bitcoin to be gone, but realistically speaking it may not happen. Reasons are First no Electricity, if this happens bitcoin will not exist and we are back to the dark ages, with this being said, if there is no electricity worldwide then there is no Internet as well. The other reason is that there is no market. If people does not support bitcoin then it will not exist simple as that. Bitcoin still rely on the community that supports it. The hardware and stuff are only secondary to that.