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Cryptocurrency is digital money that is used to buy and sell online.
It is an entirely decentralised system that use...
Say you want to buy a bike from a friend using, for example, Bitcoin.
To ensure that every block of transactions on the chain is verified, a subset of Bitcoin's network tries to solve the complex puzzle. The first one to succeed is rewarded with Bitcoins of their own. The network then adds the new block on the chain.
This process is ...
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