that's a good question. There's a potential use in payments and in smart contracts. I found useful publisher advertising network that can boost crypto business and attract target audience. Luckily they have flexible pricing models, I'm gonna use their services in the near future. I'm working on my blockchain business and hope blockchain technologies still will be profitable in the future.
I don't think blockchain is a good option to learn if you don't have any experience in crypto related stuff. Try better learn more simple theory first. As I know blokchain is a system of recording information in a way that makes it difficult or impossible to change, hack, or cheat the system. A blockchain is essentially a digital ledger of transactions that is duplicated and distributed across the entire network of computer systems on the blockchain. After blokchain I recommend you to read about crypto mixers or check blender.io review about btc mixers and how they work as well.