It seems to me that Blokchain will be used by highly developed countries in the field of public administration.  Some governments have already said that using the blockchain technology, it will be possible to create a smart digital country system where citizens can access all the necessary state resources using their smartphones and at the same time do not need to visit any offices in person.  Using the blockchain, you can vote or receive various data, as well as send requests for documents from different ministries or structures.  The field of activity is very large.