Bitcoin's 3 Biggest Challenges | NEHA NARULA

— MIT's Digital Currency Initiative (DCI) was founded in 2016 to support Bitcoin and broader digital currency research, initially hiring three core Bitcoin developers (Gavin Andresen, Wladimir van der Laan, Corey Fields) when the Bitcoin Foundation collapsed. DCI operates within MIT Media Lab—a multidisciplinary environment mixing art, design, hardware, and science rather than a traditional CS or finance department.

— Bitcoin developer funding landscape includes DCI, Brink (independent nonprofit), Chaincode Labs (privately funded by hedge fund founders), Spiral (Block/Jack Dorsey), and grant organizations like OpenSats. The ecosystem is decentralized but fragmented, with no centralized governance; developers maintain significant autonomy in choosing research priorities.

— Quantum computing poses technical and governance challenges requiring tradeoffs: when to act, which post-quantum signature scheme to adopt, how to handle quantum-vulnerable coins (particularly Satoshi's holdings), and whether to prioritize making new transactions quantum-safe before resolving the Satoshi coins question. The speaker advocates addressing post-quantum transaction security first rather than waiting for consensus on all issues.

— CBDC research conducted by DCI with central banks (Federal Reserve, Bank of Canada, Bundesbank) focuses on designing privacy-preserving digital cash—not surveillance tools. The research explores whether central banks can build digital cash with cryptographic privacy properties, demonstrating technical feasibility to inform policy decisions.

— Bitcoin's existential challenges include quantum cryptography vulnerabilities, long-term mining security when block subsidies decline (requiring consistent fee markets, not speculative assets), and ensuring Bitcoin remains decentralized and self-custodial rather than custodied by institutions. These three issues are interconnected and will drive governance debates.

— Scaling and self-custody are fundamentally linked; if users cannot self-custody or execute payments without intermediaries, Bitcoin loses its permissionless narrative and becomes just another custodial asset. Layer 2 solutions and on-chain capacity improvements are prerequisites for enabling self-sovereignty at scale.

— Support post-quantum signature adoption without waiting for Satoshi coins consensus. The speaker argues that enabling users to move to quantum-safe cryptography now (via proposals like BIP360) should not be gated by unresolved questions about dormant quantum-vulnerable coins. This pragmatic phasing reduces uncertainty for holders and lets market forces, not deadlock, determine outcomes.

— Recognize that scaling and self-custody are prerequisites for Bitcoin's long-term value proposition. If the network cannot support self-custodial payments at scale, users will be forced into institutional custody, undermining decentralization. Evaluate Layer 2 solutions and development funding through the lens of whether they preserve or compromise self-sovereignty.

— Monitor corporate involvement in Bitcoin governance. Major institutions now have substantial financial stakes and may begin funding developers or organizations focused on existential challenges (quantum, mining security, scaling). This mirrors the block size wars but with more capital at risk; holders should track whether corporate interests align with decentralization principles.