Here’s a concise, neutral timeline for context: - 2015–2017…

Here’s a concise, neutral timeline for context:
- 2015–2017: Scaling debates over how to handle more transactions. Two main camps formed: keep blocks small and use upgrades like SegWit and Layer 2 (BTC), vs. increase on‑chain block size (big‑blockers).
- Aug 1, 2017: Bitcoin Cash (BCH) hard-forks from Bitcoin over larger blocks. BTC activates SegWit and remains the chain with the original history and ticker “BTC.”
- Nov 2017: The proposed SegWit2x hard fork (the “New York Agreement”) is called off due to lack of consensus.
- Nov 2018: BCH itself splits into BCH and Bitcoin SV (BSV). BSV, led by proponents including nChain/Craig Wright/Calvin Ayre, pursues very large blocks and claims adherence to an “original vision.” It is not the 2009 original chain; it is a 2018 fork of BCH.