In this interview, host Niko Laamanen asks Bitcoin pioneer Adam Back a series of community‑submitted questions. Back first defines Bitcoin in a single sentence as a scarce, permissionless, censorship‑resistant digital commodity. He then explains the upcoming activation of Schnorr signatures and Taproot, noting that Schnorr makes multi‑signatures compact and reduces fingerprinting, while Taproot hides unused script branches, improving privacy, fungibility and modestly reducing transaction size. When asked about Blockstream Satellite’s integration with the Nodle “personal Bitcoin assistant,” Back says a public discussion exists, and recent software optimisations now allow the satellite receiver to run on a low‑cost Raspberry Pi 3+ instead of a laptop, potentially enabling cheap global node access. The conversation moves to security tokens, where Back describes Blockstream’s Liquid sidechain as a Bitcoin‑anchored platform that supports native asset issuance, confidential transactions, and can host security tokens or stablecoins without creating a new coin. Finally, he shares his view that Bitcoin’s massive network effect and security focus will likely make it the singular base layer for most blockchain use‑cases in the long term, with layer‑2 solutions handling specialization, and that new technologies would be adopted into Bitcoin rather than spawning competing altcoins. Throughout, Back balances optimism about upcoming upgrades with a measured, network‑effect‑centric perspective.
Questions this video answers
It's a scarce digital commodity that is permissionless, censorship‑resistant electronic cash.
Probably late this year or next; Schnorr makes multi‑signatures compact and reduces fingerprinting, while Taproot hides unused script branches, improving privacy, fungibility and modestly reducing transaction size.
No firm timeline, but public discussion exists; recent software optimisations allow the satellite receiver to run on a Raspberry Pi 3+ (~$45), making integration feasible.
Security tokens can be issued on Bitcoin’s Liquid sidechain, which supports native assets, confidential transactions, and uses Bitcoin for fees; value depends on market adoption.
Bitcoin’s network effect and security focus will likely make it the dominant base layer, with layer‑2 solutions handling specialization; altcoins may remain niche unless a fundamentally superior technology emerges.
Chapters
Okay. Hello, Adam. It's nice to have you here, and thank you for giving me your time.
Sure.
So I'm gonna keep it short. I have 2 actual questions from the community from Finland, and I would like for you to— for the starters, could you just try and define Bitcoin in one sentence?
So I think it's kind of, in terms of its value, it's like a digital commodity. So it's something scarce. And in terms of its properties, it's permissionless, censorship-resistant electronic cash.
That's very good. I'm pretty excited about the developments in Bitcoin lately, especially Schnorr signatures and Taproot. Could you comment on When do you think those will be in full use? What are the actual implications and why are they important?
I'm not sure of the exact timeframe, but, you know, maybe late this year or next year. I'm not really kind of tracking day to day, but I did see that there were several BIPs, like specification drafts, published recently and quite a lot of discussion on the technical forum. So, and then what Schnorr and Taproot do. So Schnorr signatures are a more compact signature format, particularly for multi-signatures. So you can have, let's say, a 3-of-3 signature and it looks the same size as one signature. The other advantage of it is that it reduces fingerprinting. So you can't distinguish on the blockchain potentially between 2-of-2 signature and a single signature. And then the other thing that's been proposed to deploy with it is Taproot, which is a different idea that Greg Maxwell introduced, which is that many Bitcoin contracts are structured as ORs, right? So it will say either the owner has to sign with this key, Or something more complicated has to happen. So there's a kind of programming branch in the code, and you get fingerprinting because different types of use cases have different scripts or contracts. So you'd be able to distinguish, let's say, a Lightning transaction from a Green Wallet transaction, which are both multi-signature use cases. And that would provide some kind of fingerprinting, like which type of wallet is it, what kind of payment is it. So with Taproot, you can avoid that because the typical pattern is 99% of the time only one branch is used, and occasionally something will go wrong and you'll have to use the other branch. So for the cases where the branch is never disclosed, Taproot can hide the existence of the branch, so you only disclose it if you need to use it, and you don't know for sure if it even exists, you know, from the outside just looking at the transaction on the chain. So I'd say that Taproot saves a bit of space and it greatly reduces the fingerprintability of different wallets, which indirectly improves kind of privacy and fungibility. But more transactions look similar. You may not be able to, for example, distinguish a Lightning channel setup from a single signature payment from a multi-signature green wallet payment. They may all look the same after— with Schnorr and Taproot combined.
So basically that means more privacy and scaling, right?
Right, a little more scaling because the signatures are smaller. The multi-signatures become single-sized and the base typical transaction just becomes a signature without, like, you know, if you do a multi-signature with an OR branch today, you have to disclose the OR branch and you have to disclose the code and the code itself takes space so that you save that space normally.
Wow, thank you. So the community question is regarding Blockstream Satellite, which is a very awesome project. And I'm sure, well, you are familiar with Nodle, the personal Bitcoin assistant. And for the viewers, it's basically a small computer that handles the node, Lightning node, P2P server, and stuff like that. So I heard a rumor that there's an integration between Blockstream Satellite and Nodle. Is that true? And if so, can we have a timeline?
I'm not sure on the timeline, but I think there was some public discussion on Twitter about doing integrations like that. And there are some very compact software-defined radio parts, like very small USB devices. And we have recently been able to optimize the software part of it because what it does to keep the cost low is it does Analog-to-digital conversion using the USB dongle between the satellite dish and the computer, and then it does the signal processing on your laptop or embedded computer's CPU. And in the first iteration, it required a processor of an Intel i5 kind of speed, something similar to that. But the most recent version with optimizations, it runs on a Raspberry Pi 3 Plus, which is a— 4 GHz. 4-core ARM64, so it's a fairly powerful ARM processor. But the whole computer with a Raspberry Pi 3 specification is about a $45 piece of equipment. So it definitely brings the cost down from, you know, a secondhand laptop with an i5 processor is not so cheap compared to a Raspberry Pi 3. And I think some of the nodes like the Nodle will have enough compute to do that, and we may be able to optimize Further in the future as well.
Oh, that sounds really exciting. Another question from the community is about the security tokens, which I heard you talk about also. And I'm interested in your opinion because there's a project called Ravencoin, which is apparently a big thing between some Bitcoin maximalists. And also in the Finnish community, there's a lot of supporters for that because it's a Bitcoin fork. And somehow people seem to think that the security tokens are the future. So do you care to comment? What is the actual future of security tokens and how does that tie into Bitcoin? Or is there another— would it be better to do on another protocol entirely?
Yeah, I mean, so I tend to think that it's— most things can be implemented as extensions to Bitcoin as Bitcoin gets to be more modular and more layered in the same way that other protocols like the internet are organized. You know, with the internet, there's TCP/IP. And then there is, you know, HTTP for web browsing and SMTP for mail browsing and different protocols for voice and video. So with Bitcoin already, there are multiple layer 2 things. So there's Lightning for retail payments and Liquid, which is a sidechain that Blockstream has been developing, is a way— is optimized. It's another layer 2. It's a sidechain technically, which means you can move Bitcoins between the main Bitcoin chain and the sidechain and back again. So there's no kind of new coin, no new floating coin introduced. You pay transaction fees with Bitcoin. And because it's for the exchange trading use case, Liquid introduces a number of features including native support for issued assets, which could be security tokens or US dollar fiat coins, stablecoins. or represent other underlying assets in the custodianship of a provider. So, and it also provides better confidentiality, so confidential transactions. So the values, i.e., how many coins you transferred, how many dollars, how many euros, and the type of the coin is also encrypted. And yet it's still a public blockchain because you can run a full node. And verify the integrity of the chain because the encryption is done in such a way that somebody from the outside who's not part of the transaction can still see that the transaction inputs add up to the outputs, basically. And there are block explorers and full nodes and wallets for this. And, you know, to create an asset is just a special kind of transaction. So you pay the, you know, the size-related transaction fee and you can create an asset. Now, of course, whether the asset has Value depends on, you know, being able to persuade an exchange to list it and to persuade investors that, you know, something useful is being done, right? That there's a startup using the funds raised to build technology, or there's a custodian with some asset underlying it.
So based on what you told me, do you think in the future, like, let's say in 1 or 2 decades, all of the possible viable use cases of blockchain or tokenization could be covered with Bitcoin, or do you think we still have some kind of a market for altcoins or shitcoins?
I mean, I tend to view it as the network effect winning, and Bitcoin has a lot of network effect and a lot of focus on security first. So I think security and robustness is very important, and You know, if you think about the early internet, there wasn't this phenomenon because there wasn't a way to, you know, make money or raise funds for development by making copies or modified versions of TCP/IP. And so it quickly settled onto one chain. So I think ultimately the network effect and sort of scarcity of development resources and the benefits of being able to have everything interoperate It means that eventually everything will be on one protocol at the base layer with different specializations above it. So I'm not really, you know, a big believer in so-called utility tokens. And I think things like— things that are shares in companies can be done in layer 2 Bitcoin-related networks like Liquid. So, and, you know, the other kind of what-if that people raise is, what if some significantly better technology is invented in the future? And there are interesting technologies that are, you know, plausible but have big R&D questions left, like efficient SNARK-related technology with better security guarantees. If some major leaps are made in that, that could be applied to Bitcoin to improve it. So the way I see that working is not that a new coin would emerge, but that Bitcoin would adopt the technology. And so people then will ask, well, is it possible to adopt technology? And I say that generally it's possible to adopt any plausible technology because in the worst case, you know, you can always fall back to the method of starting a new network and importing the UTXO set into it and switching over to the new network technology. So it's kind of major version upgrade. Compared to a minor version upgrade where, you know, new opcodes are introduced and new efficiencies are added. So yeah, I tend to think about things in terms of single network prevailing in the longer term.
That makes a lot of sense and I agree with you. Thank you so much for your time, Adam, and it was a pleasure talking to you.
