Never! Bitcoin won't eclipse the existence of national currencies! And I don't think bitcoin is a threat for the jobs too. Everybody wants a good job, Only money can't make you happy, A good job can change people's attitude, lifestyle, and many things! Bitcoin and Jobs are different in my view, there is no connection between them. But bad jobs will be ignored, A good Job will be accepted more than anything! My elder brother is a trader and crypto genius but he is doing a good job too!