If Bitcoin's popularity continues to grow, there are some potential scaling solutions that do not involve creating any changes to the structure of Bitcoin, but which take advantage of the way transactions are structured to increase the number of payments possible. Each Bitcoin transaction can contain several inputs and outputs, and using a technique called CoinJoin, several payments can be grouped together into one transaction, allowing several inputs and outputs for only a fraction of the space that would have been needed otherwise. This could potentially raise the transaction volume of
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