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The Fiat Standard — Lecture 14 (Bitcoin Scaling) • Study Notes

Overview

Global digital payments today: 2–3 billion non-cash transactions per day.
Bitcoin’s on-chain peak: ~500,000 transactions/day (~0.017% of global volume).
To process all digital payments on-chain, Bitcoin would need a 6,000× capacity increase.
Naïve solution: bigger blocks = more transactions.
Problem: larger blocks undermine decentralization, which is Bitcoin’s core value.

Idea: Increase block size → more transactions per block.
Reality:
Larger blocks → harder to download & sync → fewer nodes can participate.
Leads to centralization (only powerful computers can keep up).
Example: To handle global non-cash transactions, Bitcoin would need 5 TB blocks every 10 minutes.
No consumer hardware can support this.
Would shrink the network to a handful of operators.
Trade-off:
Efficiency vs. decentralization.
Centralized systems (e.g., PayPal, Visa) are already efficient.
Bitcoin’s value lies in being decentralized and uncapturable.

Decentralization is non-negotiable:
Bitcoiners resisted block size wars; preserving small blocks preserves sovereignty.
Running a node must remain possible for anyone (~$100–700 hardware).
On-chain = cash settlement:
Bitcoin transactions are final settlement, not retail payments.
More comparable to interbank transfers than buying coffee.
Consumer payments can run on second layers.

Bitcoin block space = scarce resource.
Analogy: shuttle bus leaving every 10 minutes, limited seats, auction for entry.
Result:
Transaction count has plateaued since ~2016 (~200–300k/day).
Value per transaction has skyrocketed (from ~$10 avg in 2011 → ~$30–40k avg today).
Total settlement volume continues to grow (billions daily).
Economic pattern:
Low-value uses get priced out → off-chain.
High-value uses dominate on-chain.
Just as cows don’t graze in Manhattan, trivial transactions won’t live on Bitcoin’s blockchain.

Putting Bitcoin into channels = investment, not cash holding.
Similar to investing in a payments company.
Provides liquidity for routing payments in exchange for fees.
This specialization → emergence of professional liquidity providers.
Likely outcome: hub-and-spoke model:
Tens of thousands of large, well-connected nodes.
Individuals open a few channels to these hubs.
More centralized than coffee-on-chain dream, but far more decentralized than fiat.

Censorship:
A node operator can refuse to serve you, but cannot prevent you from opening your own channel or going elsewhere.
Centralization of liquidity:
Hubs may form, but unlike fiat banks, they:
- Cannot inflate supply.
- Cannot control protocol rules.
- Cannot unilaterally censor the entire network.
Key point:
Bitcoin doesn’t need to be decentralized enough to process every coffee purchase.
It only needs to be decentralized enough to resist monetary capture.

On-chain scaling is impossible without sacrificing decentralization.
Bitcoin’s on-chain layer = final settlement, not everyday payments.
Block space scarcity leads to prioritization of high-value transactions.
Second layers (Lightning, exchanges, multisig) handle small, high-frequency payments.
Providing liquidity = investment industry, leading to specialization and efficiency.
Even with some centralization of payment routing, Bitcoin remains fundamentally uncensorable, non-inflatable, and decentralized enough to preserve its value proposition.