Replay Attack Alarm Grows as BIP-110 Backers Brand Bitcoin ‘Spamcoin'

The article warns that a proposed BIP-110 hard fork and revival of a stalled minority Bitcoin chain could expose users to replay attacks, where one signed transaction is valid on both chains and can be copied across them. Supporters are discussing a new BLAKE2b proof-of-work fork and an opt-in replay protection scheme, but it may not provide a full automatic barrier between networks. The piece argues this creates operational risk for holders, wallets, and exchanges because users may unknowingly spend coins on both chains or fail to separate assets safely. It also highlights the market reality that the dominant Bitcoin chain retains nearly all hashrate, liquidity, and economic recognition, while the BIP-110 branch has very limited support and no exchange backing. Overall, the story is more about protocol and custody risk than immediate price action, but it reinforces uncertainty around a contentious fork and could weigh on sentiment if the revival gains traction.