**Bitcoin Rollups: The Ultimate Blockchain Battle Royale! 🥊**

- **Galaxy Research Report:** Bitcoin rollups, the darlings of layer-2 scaling, might not be sustainable long-term. Analyst Gabe Parker points out the hefty costs of posting data to the base layer.

- **The Challenge:** Rollups compress transactions into batches and post summaries to the main blockchain. But with Bitcoin blocks capped at 4MB, each data posting can hog 10% of a block!

- **Survival Game:** Rollups need to generate big bucks from transaction fees to stay in the game. Rising base-layer fees could price out smaller transactions.

- **Expert Opinions:** Alexei Zamayatin suggests using alternatives like Celestia or sidechains to cut costs but warns of potential decentralization trade-offs.

Stay tuned for more blockchain battles!