There are more than 20 ways to use Blockchain in the market, and some of them are
Rewards system for loyalty
Immutable Data backup
Blockchain technology is such an amazing innovation and it can be used in various fields such as financial services and medical services. If more people will start to appreciate and study this technology we can discover more usage of it that will definitely benefit the society. Here's a link that I found where you can read some info where you can use blockchain in different field https://blockgeeks.com/guides/blockchain-applications/
There are plenty of ways where blockchain can be used, aside from cryptocurrency. It is actually created for decentralisation where data can be stored in a decentralised storage. It can be used anywhere and any fields. Financial, education, property, business and finance and a lot more. Anywhere where people would like to avoid middlemen and seeking for decentralisation.
Think of projects and programs that need each transaction to have huge reputation and integrity. Because most of the time, we always think of possible projects to build but applying blockchain technology might not really fit for the project. I've encountered some projects before, which is mainly focused on music streaming but in my opinion, blockchain isn't really appropriate because we already have cloud storage and applying blockchain technology isn't worthy.
Let say, a voting system should be one of the best implementation of blockchain, because each vote is important and shouldn't be compromised the same way how we care about our currency and money.
Blockchain technology works on financial transaction especially on digital currency (crypto currency) that record all transactions on a digital ledger. Now a days, the use of blockchain technology can be use on medical field and transportation.