With no doubt, blockchain is one of the best careers one can pursue at the time. It is highly in demand and you get to be a part of something big. Not to mention, you will get high salaries in these top blockchain careers. It is due to the fact that the need for such positions are high and the people with relative knowledge are less. Among all the jobs required in the field, only half of them are being met. This means that there’s a shortage of blockchain professional with sufficient technical knowledge.
Can you provide a source to back up this information? I can see that Blockchain is a skill in high demand, but I can't see this data about only 50% of jobs being covered due to the lack of specialists. Blockchain is certainly a good choice due to the combination of high demand with low awareness of this demand. As a school teacher I know that the majority of pupils choose typical careers of lawyers, economists and doctors, having no idea that the world that awaits them might need good doctors but is already full of lawyers and economists. A problem with Blockchain is that, new as it is, it's not something you can learn by choosing a relevant university degree, so many try to choose from what there is to study officially. In any case, I think what's a good career depends largely on personal aspirations. One should choose what one loves, and then look for ways to incorporate this activity into something that can bring money, not the other way around.