Well, you wouldn't know it from the way the bitcoin miners blocked segwit2x, but "bitcoin" doesn't have to stay exactly the same. It can fork (soft fork even!) and the community can add code and features that will make it last forever. It *can* continue to be the one world currency. However, at the moment miners like that they can get insane fees sometimes. Basically taxing and rent-seeking while using up energy and destroying the environment. It is fun times we live in.