Inflection Point Why Bitcoin Can’t Scale | John Carvalho
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Nov 28, 2025 John Carvalho, CEO of Synonym and a Bitcoin innovator, shares his thought-provoking insights on Bitcoin scaling. He argues that the main issue isn't technology but trust. John challenges the effectiveness of Lightning and layer-two solutions, stating they inherit fundamental limitations. He highlights how trust dynamics are essential for a functional payment system and introduces his PubKey protocol for enhanced scalability. Additionally, he critiques treasury-backed products while offering a personal strategy for using Bitcoin effectively. Don't miss these unconventional views!
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There Are Math-Based Limits
- Carvalho claims there are calculable limits and congestion bounds for Lightning and similar layers that make them break under scale.
- He estimates Lightning may support only ~140,000 users in congestion before failing.
Layers Share The Same On-Chain Limit
- Layered subsystems don't increase base-layer on-chain capacity; every layer still faces the same on-chain limits.
- Unilateral exit guarantees fail when blocks are full or fees spike, making enforcement impractical in crises.
Prepare For Costly On-Chain Exits
- If you rely on a layer, ensure you can afford on-chain exit costs and hold an on-chain UTXO you control.
- Design your usage assuming you may need to pay high fees to enforce claims or sweep balances.