A blockchain allows us to build decentralised systems in which we can trust, thanks to base consensus, that:

There will be enough incentives for network participants to act honestly.
System data will be stored in several repositories (amount equal to how many nodes the network has)

This data will always be available and easily verifiable by any user.
The information cannot be deleted or modified once it has been saved.
Collaboration between agents who do not know each other but share a common goal will be made easier.

Blockchain is transforming the banking and finance industry by making transactions more secure, transparent, and efficient. One of its key uses is in international payments, where blockchain enables quicker transfers with lower transaction fees compared to traditional banking systems. Financial institutions also use blockchain to maintain accurate and tamper-resistant records, improving trust and reducing the risk of data manipulation. Smart contracts are another valuable application because they automatically complete transactions once agreed conditions are fulfilled, saving both time and administrative costs. In addition, blockchain improves fraud detection through transparent and traceable transaction histories. The technology is also used for asset tokenisation, allowing physical and financial assets to be represented digitally and traded more easily. Many banks are researching digital currencies and decentralised financial services powered by blockchain networks. By reducing intermediaries and improving operational efficiency, blockchain technology is helping create faster, safer, and more modern financial services across global markets.