The bitcoin scalability problem exists because of the practical limits on the maximum number of transactions the bitcoin network can process. It is a consequence of the fact that blocks in the blockchain are limited to one megabyte in size. Bitcoin blocks carry the transactions on the bitcoin network since the last block has been created. In contrast to Visa’s peak of 24,000 transactions per second, the bitcoin network’s theoretical maximum capacity sits between 3.3 to 7 transactions per second. Various scaling proposals, some activated, are described below.
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