On The Brink with Castle Island Weekly Roundup 04/17/26 (BIP361 proposal, SEC's DeFi frontend policy, CSW's Bitcoin movie) (EP.714)
Apr 17, 2026
They unpack Jameson Lopp's BIP-361 and proposals for handling quantum-vulnerable Satoshi coins. They debate recycling Satoshi coins into tail emissions and a court-mediated salvage process. Regulatory moves get attention: SEC guidance on DeFi frontends and Goldman’s Bitcoin ETF filing. Pop culture moments include a new Satoshi documentary and a Hollywood movie about Craig Wright.
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BIP361 Staged Freeze For Quantum Migration
- BIP-361 outlines staged activation to migrate to post-quantum scripts and then reject legacy scripts, effectively freezing vulnerable coins after a sunset period.
- Jameson Lopp's BIP became an official BIP and creates a 2–3 year migration window before legacy spending is disallowed.
Burn Or Tail Emission To Resolve Frozen Coins
- Consider burning or instituting a long tail emission for frozen Satoshi coins to avoid concentrated claims and fiscal shock.
- Nic Carter favors burning or a 100-year tail emission to fix long-term miner revenue without altering short-term supply dynamics.
SEC Guidance Eases Broker Dealer Risk For DeFi Frontends
- The SEC's new guidance suggests DeFi frontends need not register as broker-dealers if they avoid monetizing order flow, giving advice, or taking custody.
- This benefits wallets and frontends like Zengo and Uniswap by reducing broker-dealer risk so long as they don't route-for-fee.
