Bitcoin developer says self-custody fears cost him gains

German Bitcoin developer René Pickhardt said on Aug. 6 that fears about self-custody security and key management kept him from accumulating more Bitcoin, despite believing the asset had upside. Summary Bitcoin developer René Pickhardt says self-custody security concerns kept him from accumulating more BTC earlier. Coldcard vulnerabilities made some wallet seed phrases predictable, exposing users to remote key recovery attacks. Galaxy Research estimates roughly 1,755 BTC was stolen across several waves linked to vulnerable wallets. Coinkite says patched firmware cannot repair previously generated weak seeds, requiring users to migrate funds. Adam Back argues Bitcoin self-custody remains powerful but requires users to accept greater security responsibility. In a post, Pickhardt wrote that “security & key management always freaked me out,” framing his decision as a risk-management choice rather than a criticism of Bitcoin. Bitcoin developer cites self-custody fears, source: X His remarks landed after the Coldcard hardware-wallet incident renewed scrutiny of how self-custody tools generate private keys. Security research linked vulnerable Coldcard firmware to predictable seed gener...