What is Bitcoin Cash?

Bitcoin Cash (BCH) is an upgraded version of the Bitcoin Core software. It was released on August 1st, 2017. 

Definition of 'Bitcoin Cash'
Bitcoin cash is a cryptocurrency is a fork of Bitcoin Classic that was created in August 2017. Bitcoin Cash increases the size of blocks, allowing more transactions to be processed.

The main upgrade offered by Bitcoin Cash is an increase of the blocksize limit to 8mb. This effectively allows miners on the BCH chain to process more payments per second. This makes for faster, cheaper transactions and a much smoother user experience.

Why was Bitcoin Cash Created?
Bitcoin Cash was created to bring back the essential qualities of money inherent in the original Bitcoin software. Over the years, these qualities were filtered out of Bitcoin Core and progress was stifled by various people, organizations, and companies involved in Bitcoin protocol development. The result is that Bitcoin Core is currently unusable as money due to increasingly high fees per transactions and transfer times taking hours to days. This is all because of the problems created by Bitcoin Core’s blocks being full.

Breaking Down 'Bitcoin Cash'
Since its launch, Bitcoin faced pressure from community members on the topic of scalability. Specifically, that the size of blocks – set at 1 megabyte (MB), or a million bytes, in 2010 – would slow down transaction processing times, thus limiting the currency’s potential, just as it was gaining in popularity. The block size limit was added to the Bitcoin code in order to prevent spam attacks on the network at a time when the value of a Bitcoins was low. By 2015, the value of Bitcoins had increased substantially and average block size had reached 600 bytes, creating a scenario in which transaction times could run into delays as more blocks reached maximum capacity.

A number of proposals have been made to deal with transaction processing over the years, often focusing on increasing block size. Because the Bitcoin code is not managed by a central authority, changes to the code require buy-in from developers and miners. This consensus-driven approach can lead to proposals taking a long time to finalize. This has resulted in groups creating separate blockchain ledgers using new standards, called a fork. Several forks, such as Bitcoin XT and Bitcoin Unlimited, failed to be adopted by a wide audience. Bitcoin Cash, launched in August 2017, is another fork from Bitcoin Classic.

Bitcoin Cash differs from Bitcoin Classic in that it increases the block size from 1 MB to 8 MB. It also removes Segregated Witness (SegWit), a proposed code adjustment designed to free up block space by removing certain parts of the transaction. The goal of Bitcoin Cash is to increase the number of transactions that can be processed, and supporters hope that this change will allow Bitcoin Cash to compete with the volume of transactions that PayPal and Visa can handle by increasing the size of blocks.

Because the computer power required to process larger blocks could price out some smaller miners, critics worry that adopting Bitcoin Cash’s approach will lead to power being concentrated in the hands of companies that can afford more and better equipment. Opponents to the fork worry that this will threaten the consensus-driven approach to Bitcoin, as a small number of companies could control Bitcoin and more readily force changes on the community in the future.

A successful hard fork for Bitcoin Cash entails surviving long enough to entice individuals and companies to use and mine the new digital currency if it is able to build substantial interest and reach critical mass. Once this point is reached, however, Bitcoin Cash may find that its success has prompted others to develop their own alternative coins, which would put the same pressure on Bitcoin Cash that it had placed on Bitcoin Classic. Since the issue of scalability tends to be at the forefront of cryptocurrency debates, developers have made increasing block size and improving transaction processing speeds their top focus areas.