Cryptocurrencies are just one way to use blockchain technology. Although they are still few in number, there are already examples of the successful implementation of blockchain products in commercial projects: For copyright registration and document authentication:
Binded can be used to confirm copyrights for photos and other visual content. The service was bought by photo rights platform Pixsy.
The University of Cyprus in Nicosia uses a blockchain system to store educational documents that are globally recognized. Several other institutions in other countries have supported the idea. To solve government problems:
Estonia has a blockchain-based e-Estonia e-citizenship system, where elections are held and taxes are paid. I know that they involved guys from https://finpr.agency/ in this. The use of blockchain technology allows Estonia to save about 2% of GDP every year.