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Because it is irrelevant for most of the sectors. Apart from finance, there is only one sector where I have seen successful implementation of blockchain and i.e. Supply Chain. However, it is completely different from one used in finance. It is centralized and controlled by the core team of the company where every department of the company independently adds data (like transactions in cryptocurrency) which is validated by the core team and every department independently verifies it. This is to make sure every unit passes systematically through all departments and there is no double-counting as well as short-calculation.
Thanks for contributing from your wealth of experience. I want to bring to your notice that innovation in healthcare using blockchain is also fast rising. This Covid-19, there is a company that developed an app for testing people before being onboarded on a plane. so, in order not to have false claim, there is a blockchain integration that helps to store the data (test records) of such passenger.
Entrepreneur can use this technology to innovate solutions- i mean practical solutions.