There will be no hinder in the job due to the blockchain adoption because it is going to be the same work as before but in more secured and transparent way.But in the future AI and robotic development will surely replace most of the current jobs from the world so we need to get ready with our skills to work in the future by undertaking enough courses by now itself.
AI might dominate our lives in the near future, if the AI industry maintain its fastly growth speed like we have seen within last several years. However, I don't see the risk that AI-based apps/ technologies will totally replace human and take over all human works. Let's look at it in the aspect like this:
Who code and design AI-apps? Actually, the answer is human, right? So, AI-apps depend on human, definitely. The answer has become clear now, that human can manipulate AIs, and we will have our jobs.