Blockchain holds great promise for disrupting and decentralizing many industries and markets. In future, people should be able to benefit from blockchain technology in the form of reduced costs for transactions, enhanced privacy and data security, and great efficiencies.
For example, blockchain technology can allow us to introduce "self-sovereign identity" paradigms in the digital realm, allowing individuals to own and control access to their personal data, and to better be able to trace how their data is used online. This could help support a more secure, safer Internet.
While there is a great deal of work going on in this space, most of it is still in the development phase. Today, the most prominent way to “use” blockchain is to invest in cryptocurrencies or use them to buy and sell things in certain markets.