What you need to know about the SegWit2x

“What You Need to Know About SegWit2x”


In the world of cryptocurrency, innovation and progress are constants. One significant development that captured the attention of the Bitcoin community was SegWit2x. This proposed upgrade aimed to address some of Bitcoin’s scalability issues and improve transaction efficiency. However, it also sparked heated debates and controversies within the community. To understand the implications of SegWit2x fully, let’s delve into the details.


“1. The Background of SegWit2x”

SegWit2x, short for Segregated Witness and 2MB Block Size Increase, was a proposed protocol upgrade for the Bitcoin blockchain. It was a combination of two solutions aimed at tackling the scalability problem faced by the original Bitcoin blockchain. The first part, Segregated Witness (SegWit), sought to optimize the way transaction data is stored in Bitcoin blocks, while the second part intended to increase the block size from 1MB to 2MB.


“2. Segregated Witness (SegWit) Explained”

Segregated Witness, which was implemented through a soft fork in August 2017, separated the transaction signatures (witness data) from the transaction data itself. By doing so, SegWit freed up space within each block, allowing more transactions to be included in the blockchain. This upgrade also fixed transaction malleability, a problem that allowed attackers to change transaction IDs without altering the transaction’s content.


“3. The Debate and Contentious Hard Fork”

While the adoption of SegWit through a soft fork was relatively smooth, the second part of the SegWit2x proposal, the block size increase, became the center of controversy. Some Bitcoin community members believed that increasing the block size was necessary to accommodate more transactions per block, thereby improving scalability and reducing transaction fees. However, others were concerned that a significant block size increase could lead to centralization, making it more challenging for individual miners to participate.


“4. The Fork and Suspension”

SegWit2x was scheduled for a hard fork in November 2017, but the debate intensified as the date approached. In the end, the proposed hard fork was suspended just days before it was supposed to take place. The lack of consensus among the community and the risk of a chain split led the developers behind the proposal to call off the fork. This decision was met with mixed reactions from the community, with some supporting the suspension and others feeling disappointed that the upgrade didn’t go ahead.


“5. Aftermath and Impact”

Following the suspension of SegWit2x, Bitcoin continued to operate with its original 1MB block size. Although the upgrade didn’t occur as planned, SegWit was successfully activated and provided its benefits to the network. Transaction fees decreased, and the overall transaction capacity improved. Meanwhile, other scaling solutions, such as the Lightning Network, gained momentum and offered promising alternatives for improving Bitcoin’s scalability.


“6. Lessons Learned”

The SegWit2x saga highlighted the challenges of achieving consensus in a decentralized community like Bitcoin. It demonstrated the importance of open dialogue and collaboration among stakeholders when proposing significant changes to the protocol. While SegWit2x didn’t come to fruition, the discussions and debates it sparked contributed to the ongoing development of the Bitcoin ecosystem.



SegWit2x was a highly debated upgrade that aimed to enhance Bitcoin’s scalability by combining Segregated Witness and a block size increase. Despite its suspension, the discussions around the upgrade led to valuable insights and the successful activation of SegWit. Bitcoin’s journey is a testament to its resilience and the dedication of its community to drive innovation while preserving the core values of decentralization and security. As the cryptocurrency space continues to evolve, it remains essential to learn from past experiences and work together to build a more robust and scalable future.