It seems like I learn something new everyday about it. The only area I know a decent amount for real use is blockchain potential use in the insurance industry because that is where I work. I was reading an article on Forbes and the Insurance Journal the other week about how startup Insuritech companies are beginning to try to use blockchain to handle Auto claims. They were working on somehow incorporating it into property & casualty insurance as well.
The only issue is with how regulated that industry can be but that is a HUGE thing that I see coming from blockchain in 2018 and the coming years.