TFTC: A Bitcoin Podcast The Difficulty Adjustment (and Target) | Pierre Rochard, Center of Hash E006
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Sep 2, 2025 
Pierre Rochard, CEO of the Bitcoin Bond Company, dives into the fascinating world of Bitcoin's difficulty target and adjustment. He explains how these mechanisms not only impact the energy consumption of the network but also play a crucial role in transaction finality and Bitcoin's fixed supply schedule. Rochard discusses the intricacies of Bitcoin mining and the balance needed to maintain network security, along with future innovations in mining economics. His insights provide a comprehensive look at how these elements influence the stability of Bitcoin as a decentralized currency.
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Fee Markets Reveal Hidden Finality Preferences
- The visible security budget is hidden when demand is low because true willingness to pay only shows under congestion.
- Fee markets in the mempool reveal users' revealed preferences for finality in stressed times.
Permissionless Hashrate Entry Prevents Lasting Censorship
- Proof-of-work allows permissionless entry: disgruntled users bidding higher fees can attract new miners and undo censorship.
- This open entry deters sustained attacks or coordinated empty-block censorship.
Don't Equate Most Work With Validity
- Check blocks for validity beyond proof-of-work because nodes reject invalid transactions or incorrect issuance.
- Do not assume the longest chain wins if a proposed block breaks protocol rules.
