In general, I'm afraid that soon such times will come when the machine almost completely replaces people in all spheres of activity. This progress is also not to escape from it. There millions of people lost their jobs because their professions turned out to be more simply unnecessary. They were replaced by robots and computers. Bitcoins not an exception, since this is one of the most highly technological products to date. It will also take on not a small part of the work. We are waiting for reforms and restructuring, regardless of bitcoin.
Bitcoin is not made to make people lose jobs. It will take decades before (and if ever) people stop using fiat money and banking. Of course if it happens bankers and people involved in the creation, storing, transportation of fiat money will have to find new jobs. This happens all the time and life continues onwards.
100 years ago there still were blacksmiths and then their jobs started to disappear as less and less people needed horses and metal workshops with milling machines took over. Did our parents and grandparents shed a tear for the blacksmiths? I doubt that.