Bitcoin is special. While not exactly like anything that has existed before, it can be compared to things you already know by using analogies. They aren't perfect. This video isn't about defining Bitcoin, but about making it a little bit more understandable.
Bitcoin is scarce. It is expensive to produce. It is highly divisible and uniform. It can be transported cheaply through space and time. For these reasons people treat it as a hard asset and store wealth in it.
Bitcoin consists of many thousands computers, called *nodes*, communicating together, using the same protocol. Anyone can connect, there are no technical restrictions to participate in the network.
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## Central bank
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## Bitcoin is like a central bank
Bitcoin maintains a database that represents a ledger. This ledger records all the Bitcoin that were ever created and all the transactions that were ever made.
The Bitcoin nodes are verifyng the ledger all the time. If someone tries to put invalid data into the ledger, the nodes will immediately notice it and see it as bad.
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## The law
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## Bitcoin is like the law
The nodes aren't merely verifying, they are also enforcing. Invalid data is not just immediately spotted, it is also immediately rejected. The Bitcoin network automatically rejects any record that doesn't follow the rules. What is written, that happens.
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## Decentralised
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## Bitcoin is decentralised
Unlike everything mentioned so far, Bitcoin is also *decentralised*. It is the most decentralised system we know. There is noone that can break the rules or change them.