These jobs are only applicable in certain countries due to the lack of knowledge of different countries to venture into the Cryptocurrency Industry. Jobs relating to Cryptocurrency or Blockchain Technology would be really helpful if they are backed by the government because it needs to run well for it to help the countries economic status.
Implementation of knowledge about bitcoin is very hard, especially if some people on your country don't have internet to have access. Obviously, jobs that is related in cryptocurrency is not for evryone, most of the porgrammers or any computer-related course fits in here.