Jan 2, 2019 · 28m · a16z
a16z Podcast | Beyond Bitcoin -- The Blockchain
Ed Felten · 10m spoken Chris Dixon · 6m spoken Matthew Green · 3m spoken Michael Copeland · 24s spoken
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This a16z podcast episode features computer scientists Ed Felten and Matthew Green alongside Andreessen Horowitz general partner Chris Dixon discussing the technological, economic, and regulatory evolution of Bitcoin and blockchain technology beyond digital currency. The panel explores key topics including smart contracts, altcoin dynamics, network effects, state regulation, multi-layer infrastructure, and long-term mainstream adoption drivers.
How this conversation actually went
Every chapter scored 0–10 on four independent dynamics. Hover any point for the reasoning behind the score. How this is scored →
The host as informed peer 0.0 Guest teaching 4.8 Guest disagreement 2.8 The host pushing back 0.0
speaking balance: gold is the host, purple is the guest (3 minute bins)
Sharpest disagreement ▶ 27:22 Dixon dismisses mainstream academic economists
Chris Dixon forcefully rejects premises from prominent economists like Paul Krugman, stating they make basic mistakes and clearly haven't read the whitepaper.
Hardest push from the host ▶ 17:38 Audience member rejects off-chain solution claimThe questioning audience member explicitly rejects Dixon's Coinbase settlement defense by pointing out it fails when transactions happen outside that internal network.
Biggest teaching moment ▶ 25:53 Felten explains monetary policy consensus flexibilityEd Felten corrects common misconceptions by explaining that Bitcoin's 21-million coin limit is not mathematically fixed but an adjustable software parameter dependent on community consensus.
The host holds their own ▶ 0:00 Introductory framing by podcast hostThe official podcast host Michael Copeland introduces the panel topic and sets up the academic context before stepping aside for the Q&A format.
the scores for every segment, with the reasoning behind each
| Chapter | Topic | The host as informed peer | Guest teaching | Guest disagreement | The host pushing back | Why |
|---|---|---|---|---|---|---|
| Distributed Autonomous Companies and Software Agents | 0 | 4 | 2 | 0 | The host is absent during the Q&A panel while Ed Felten reframes the audience premise of 'distributed autonomous companies' into technical 'mechanisms' or software agents. Matthew Green adds context on ZeroCoin's attempts to integrate with Bitcoin before launching an altchain. | |
| Taxation, Financial Privacy, and State Regulation | 0 | 5 | 2 | 0 | Felten educates on the differences between cash and Bitcoin for off-the-books transactions, pointing out that government regulators cannot simply call a protocol on the phone to negotiate. Green adds perspective on financial institutions acting as de facto law enforcement. | |
| BitLicense and Government Regulatory Responses | 0 | 5 | 1 | 0 | Felten details the New York BitLicense regulatory proposal and describes the culture clash between regulators in suits and garage entrepreneurs. Green and Felten note that federal regulators have mostly taken a wait-and-see approach. | |
| Cryptocurrency Scarcity and Altcoin Exchange Dynamics | 0 | 4 | 5 | 0 | Green directly disagrees with Felten's claim that network effects strictly limit altcoins like social networks do. Green argues exchange inefficiencies are the real bottleneck and multiple altcoins can coexist. | |
| Layered Infrastructure and Coinbase Network Effects | 0 | 5 | 2 | 0 | Chris Dixon explains Coinbase's network effects, merchant onboarding, and off-chain transaction settlement analogies to TCP and email. Green queries what happens if regulation removes the ability to opt out. | |
| Transaction Confirmation Delays and Off-Chain Solutions | 0 | 4 | 3 | 0 | An audience member pushes back on transaction confirmation delays, arguing 20-minute confirmation windows create double-spend risks. Dixon proposes off-chain layer settlements while Green notes experimental supernode solutions. | |
| Bitcoin Volatility and Sovereign Currency Pegs | 0 | 5 | 1 | 0 | Felten breaks down short-term price volatility versus long-term economic trends, explaining how payment processors absorb spot volatility risk for merchants like Coinbase does. | |
| Adoption Catalysts and Commercial Integration | 0 | 5 | 3 | 0 | Dixon pushes back against audience skepticism regarding sluggish transaction growth, placing Bitcoin six years into a multi-decade arc and comparing ecosystem development to early web infrastructure. | |
| Monetary Policy, Mining Incentives, and Macroeconomics | 0 | 6 | 6 | 0 | Felten clarifies that Bitcoin's 21-million cap is a software consensus parameter rather than an immutable mathematical law. Dixon strongly critiques mainstream economists like Paul Krugman for making basic errors and failing to read the whitepaper. |
Statements from this episode (18)
Felten: Smart contracts, DACs, and virtual corporations are fundamentally equivalent
“They're sometimes called smart contracts or virtual corporations, etc. I really just, first, first, these things are fundamentally equivalent to each other. And second, I prefer just to use the term mechanism, right?”
Green: Autonomous software agents transacting funds will make a huge impact
“I think companies is a terrible way to explain this, but I think software agents that have these capabilities, including the ability to essentially transact funds, ah, would make a huge difference.”
Green: Bitcoin core developers rejected early, inefficient versions of Zerocoin
“So we actually, when we initially came out with zero coin, it was not very efficient. We approached Bitcoin and said, Hey, this is great. You guys should adopt it. And they kind of looked at it as funny and they said, you know, this is not efficient.”
Ed Felten: Reputable businesses must report large Bitcoin transactions
“It's already the case that if you are a reputable business that deals with large Bitcoin transactions, those have to be reported to the government, or you're going to end up in behind bars pretty quickly.”
Felten: Bitcoin will become too large for traditional regulators to disrupt
“I think a lot of people in the sort of old school finance, finance and financial regulation world just think this whole thing is a bubble and will go away if they ignore it. I don't think that's true, and I think that as they wake up, they may start looking at…”
Felten: Displacing incumbent cryptocurrencies requires superior utility to overcome network effects
“I think it's the case that if you can convince the community that your new thing is enough better in, along some dimension they really care about, then there will be a space for your currency to get a foothold. Maybe something that existed before falls away, r…”
Green: Exchange inefficiencies, not network effects, limit altcoin adoption
“See, actually, I don't agree with that. I think that there's room for a large number of altcoins, and I think the reason that the existing altcoins are not as popular is just because of inefficiencies in the way that exchanges work.”
Dixon: Coinbase has reached 1.8 million consumer wallets
“They have 1.8, I think, million consumer wallets at Coinbase now.”
Dixon: Crypto UX will mirror email's corporate layer over open protocols
“I think that you'll end up in a situation like, probably like email, where you sort of depend on a corporation, but also are reassured that you can always opt out.”
Dixon: 10,000 top software developers are building on Bitcoin
“There's sort of 10,000 of the best software developers in the world are building stuff on Bitcoin”
Dixon: Crypto scaling will happen via top-layer extensions or protocol forks
“I'm saying to me, there's two paths to play out. One is you sort of build layers of extensions on top. The other is you finally say, you know what, we can't do this anymore, we fork it, or quit.”
Green: Altcoins are experimenting with supernodes for fast transaction confirmations
“So some of the altcoins, actually anonymous altcoins, have middle, semi, semi-decentralized layers, where there are the users, and then there's kind of a small number of supernodes. And an experiment that some of these altcoins are doing is trying to use those…”
Felten: Bitcoin volatility will decrease as adoption and liquidity grow
“I think the exchange rate of Bitcoin will settle down if it grows. You get more liquidity in the market, and you get more sophisticated economic modeling of what the fair price is. And then I think the volatility goes down somewhat.”
Dixon: Non-speculative Bitcoin payment transaction growth is linear, not exponential
“The best data I've seen is the transaction volume has gone up, the non-speculative, like, the payment transaction volume, it's not exponential, though, it's linear.”
Felten: Bitcoin's 21 million supply cap is changeable by community consensus
“Right now the monetary policy is grow asymptotically to twenty-one million Bitcoins, but that could change by consensus of the community. That twenty-one million limit is not inherent mathematically. It's just a number that is hardwired into the currently used…”
Dixon: Paul Krugman makes basic mistakes and hasn't read the whitepaper
“You read, like, Paul Krugman or something, and they just, he makes very basic mistakes about Bitcoin, and clearly has not read the paper, and so it's hard to take those seriously”
Dixon: Bitcoin will evolve into an underlying transmission protocol layer
“It very well could be that Bitcoin evolves in a way that I think it will. It'll be sort of a transmission protocol layer”
Dixon: Fixed asset supply does not guarantee perpetual price growth
“People say, because there's only so many of them, the price will always go up, but we have so many counters, like gold, for example, I don't think anyone thinks gold will always go up. There's plenty of examples of things with fixed quantities where the price …”