For crypto there is no need to trust third parties with your money. In other words, Bitcoin is trustless. All transactions are executed by and on the blockchain itself. There are no additional parties between the sender and the receiver of funds. - This technology gives a better world in the future.
Blockchain technology is like a bank account book that records all data and transactions that can be accessed by fellow banks anywhere, just the difference between blockchain in digital format. The result is that the system becomes more efficient, safe and transparent. It's application in banking, in other fields blockchain is very useful.