Why is blockchain trustworthy?

The chaining of the blocks ensures that the content of the block remains trustworthy at all times . For example, if a change is entered in a block, such as a payment statement, then all the computers in the entire network check the blockchain to see if the transaction was valid.

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Does anyone actually use blockchain?

Everyone says the blockchain, the technology underpinning cryptocurrencies such as bitcoin, is going to change EVERYTHING. And yet, after years of tireless effort and billions of dollars invested, nobody has actually come up with a use for the blockchain —besides currency speculation and illegal transactions.

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