How does blockchain relate to current IT jobs?

Blockchain is a distributed record technology in which transactions can be stored in linked, tamper-evident records. MCA students interested in the area should understand distributed systems, consensus and smart-contract concepts. The practical value of blockchain becomes clearer when you use it to solve an actual problem instead of studying definitions alone. This point is specifically relevant to the blockchain aspect of MCA study. For this specific question about blockchain, the practical takeaway is to relate the concept to your own MCA learning goal. In other words, this guidance addresses: How does blockchain relate to current IT jobs?