Build on Bitcoin (BOB), a hybrid Bitcoin layer-2 blockchain, posted a sharp rally after making its debut on South Korean crypto exchange Bithumb. According to the source material, BOB was listed on Dec. 3, 2025, and its token price climbed more than 120% shortly after the listing went live.
Bithumb launched support for BOB’s Korean won (KRW) trading pair, with trading scheduled to begin at 15:00 local Korean time on Dec. 3. The exchange also introduced a promotional incentive by offering zero transaction fees until Dec. 5, 2025. Such fee-free windows often help boost early liquidity, attract momentum traders, and increase visibility for newly listed tokens.
Why the market is watching BOB
BOB positions itself as a hybrid layer-2 network that aims to combine Bitcoin’s security with Ethereum’s scalability and smart contract functionality. The source notes that the network enables Ethereum-style smart contracts in a Bitcoin-focused environment, giving it a distinct place in the broader push to expand Bitcoin’s utility beyond simple value transfer.
The Bithumb listing marks an important milestone for the project. South Korea’s trading market has historically had an outsized impact on price action for newly listed assets, and Bithumb remains one of the country’s major exchanges. By adding a KRW market and pairing it with a temporary zero-fee campaign, the exchange may have helped accelerate both trader interest and short-term market activity around BOB.
Key listing details
Based on the published information, trading for BOB on Bithumb started at 15:00 Korea time on Dec. 3, 2025, while the zero-fee promotion runs through Dec. 5, 2025. The project’s main differentiator is its attempt to merge Bitcoin-grade security with Ethereum-like smart contract capabilities. Taken together, the listing-driven surge has once again drawn attention to the Bitcoin layer-2 segment and the race to build more programmable infrastructure around the Bitcoin ecosystem.