The Bitcoin Lab

In this episode, Jack Mercer tackles one of the most confusing and intimidating parts of Bitcoin for ordinary people: how to store it safely. Between exchange hacks, app glitches, phishing scams, and forgotten passwords, the question 'Where should I keep my Bitcoin?' can feel overwhelming. Jack explains the difference between hot wallets and cold storage in plain English, using memorable analogies like a cash register versus a bank vault versus a safety deposit box. He tells the story of a man who lost a fortune because he forgot a password, and another who found a fortune on a discarded hard drive—showing how the same security feature can be both a blessing and a curse. He explores the trade-offs between convenience and control, and why Bitcoin's design means you—not a company—are ultimately responsible for your money. The episode walks through the strongest arguments for self-custody and the strongest arguments for using trusted platforms, without telling listeners what to do. It ends with a clear framework for thinking about your own risk tolerance, plus what we know, what we don't, and the bottom line for anyone who wants to understand Bitcoin storage without fear or hype.

Bitcoin's 21 million supply cap is often called its most important feature, but most people don't understand what it really takes to change it—or whether it could ever happen. This episode takes that famous number and puts it in the lab. We start with why the cap exists and what problem it solved in the history of money, then walk through the actual process required to alter Bitcoin's rules: who would need to agree, what code would have to change, and why the people who run the network would have to choose to accept the new rules. We'll explore the strongest argument for why the cap might never change—because it's written into the incentives of every participant—and the strongest argument against, which is that no system is truly permanent. Along the way, we'll define terms like hard fork, consensus, and node, and we'll separate what we know from what we don't. The episode ends with a clear bottom line about what the 21 million cap means for Bitcoin's future and for anyone who uses it.

In this episode, Jack Mercer tackles one of the most confusing and consequential topics in Bitcoin today: custody. With the arrival of spot Bitcoin ETFs, millions of people now own Bitcoin exposure through a brokerage account—without ever touching a private key. That's convenient, but it raises a fundamental question: do you really own the Bitcoin, or do you own a promise? Jack explains in plain English what private keys, seed phrases, and self-custody actually mean, why the phrase 'not your keys, not your coins' exists, and what it does and doesn't tell us. He walks through real-world scenarios—exchange failures, lost passwords, inheritance planning, and everyday convenience—to show that custody isn't a moral choice but a trade-off between security, convenience, and control. He explores the strongest arguments for both self-custody and institutional custody, avoids fear-mongering, and gives listeners a practical framework for thinking about their own situation. The episode ends with What We Know, What We Don't Know, and The Bottom Line so every listener finishes with a clearer, calmer understanding of who really holds their Bitcoin.

In 2017, Bitcoin went through a bitter civil war over a seemingly boring technical question: how big should a block be? On one side were people who wanted bigger blocks for faster, cheaper transactions. On the other were people who believed keeping blocks small preserved Bitcoin's most important qualities: decentralization, security, and the ability for anyone to run the network. The conflict produced hard forks, death threats, and a rival currency called Bitcoin Cash. But the real story isn't about the drama — it's about what the resolution reveals about how Bitcoin actually governs itself. In this episode, Jack Mercer explains the Block Size Wars in plain English: what blocks are, why their size matters, who fought on each side and why, what happened when the community split, and what the outcome means for your money today. You'll learn why Bitcoin didn't just become a faster payment network, and why the fight over blocks might be the most important Bitcoin battle you've never heard of.

In 2011, the mysterious creator of Bitcoin, Satoshi Nakamoto, posted a final message and then vanished forever — never to be heard from again. That sounds like the plot of a thriller, but for Bitcoin it's actually a feature, not a bug. In this episode, we put Satoshi's disappearance under the microscope. We'll start with the strange story of who Satoshi might be — a person, a group, a government project? — and why the mystery has never been solved. Then we'll explain why Bitcoin was designed so that no single person or organization controls it, and why Satoshi stepping away is what makes that design credible. We'll examine the strongest argument against the disappearance: that a hidden creator could still secretly control Bitcoin or dump a fortune of coins. Finally, we'll separate what we actually know from what's pure speculation, and explore what Satoshi's absence means for your trust in the system. By the end, you'll understand why Bitcoin is often described as the first 'leaderless' money — and why that might be exactly what makes it revolutionary.

When people hear that Bitcoin is code, they often assume it's fragile or that someone can just change it on a whim. This episode puts that fear under the microscope. We explore how Bitcoin actually upgrades itself through a process called a soft fork or a hard fork, using real examples like SegWit and the Taproot upgrade to show how the network evolves without a CEO or central committee. The episode explains why Bitcoin's rules are hard to change, who gets a say, and what it means for safety and stability. We also address the uncomfortable question: if Bitcoin can change, is it really sound money? We'll look at the strongest argument for why upgradeability is a feature, not a bug, and the strongest argument against it from critics who worry about future changes. By the end, listeners will understand the difference between a currency that changes by decree and a protocol that changes by consensus.

Every four years, Bitcoin undergoes a dramatic change: the reward for mining new blocks is cut in half. This episode of The Bitcoin Lab breaks down the halving in plain English, explaining why Satoshi Nakamoto built this scheduled scarcity into Bitcoin's code, how it actually works under the hood, and why it's often confused with a price prediction. Jack Mercer walks through the history of past halvings, what happened to the price in the months and years after each one, and why the supply cut is a fundamental part of Bitcoin's monetary policy—not a get-rich-quick signal. He also explores the strongest arguments for why the halving could drive value, the credible counterarguments that say its effect is overstated, and what it means for the miners who secure the network. By the end, you'll understand the halving better than most people who trade Bitcoin, and you'll be able to separate the facts from the hype.

When you check your Bitcoin balance on an exchange or a wallet app, you're trusting someone else's answer. But Bitcoin was designed so that anyone—with an ordinary computer and an internet connection—can independently verify every single transaction and every single coin that has ever existed. This episode takes the intimidating concept of a 'full node' and breaks it down into plain English. Jack explains what a node actually does, why it's different from mining, how it gives you sovereignty over your own money, and why the people who run nodes are the real backbone of Bitcoin's decentralization. He also addresses the honest criticisms: running a node takes time, storage, and technical comfort, and most people won't do it. But understanding nodes helps you understand why Bitcoin is not just another database controlled by a company. You'll learn the difference between trusting and verifying, and why a network of thousands of independent verifiers is what makes Bitcoin trustworthy without any central authority. By the end, you'll know exactly what a node is, why it matters, and whether running one is something you might want to try.

When people hear that Bitcoin mining consumes as much electricity as a mid-sized nation, the reaction is often shock—or outrage. But is that the whole story? In this episode, we put the energy debate under the microscope. We start with the raw numbers: how much electricity Bitcoin actually uses, and how that compares to traditional banking, gold mining, and even the always-on data centers that power the internet. Then we dig into the crucial distinction between energy used and energy wasted, exploring how Bitcoin miners are increasingly drawn to stranded renewable energy—wind and solar that would otherwise be discarded because there's no way to transport it. We also examine the strongest criticism: that Bitcoin's security model deliberately burns energy, and that any use of electricity for a digital currency is unjustifiable when the grid still isn't fully green. Throughout, Jack separates established facts from interpretation, and avoids making predictions about future energy prices or Bitcoin's price. By the end, you'll understand why the energy question isn't simple—and why it matters for anyone trying to decide whether Bitcoin is a legitimate technology or an environmental mistake.

Every time you send digital money, your bank updates a ledger. But what if you could copy that digital file and spend it twice? For decades, this 'double spend problem' forced every digital payment system to rely on a central authority to keep track of who owns what. Bitcoin's real breakthrough wasn't inventing digital money — it was inventing a way for strangers to agree on who owns what without a bank, a government, or any central ledger. This episode takes the double spend problem out of the abstract and into everyday life. Jack explains why digital files can always be copied, why every digital payment system before Bitcoin needed a referee, and how Bitcoin's combination of public keys, private keys, a shared ledger, and a race to add new blocks makes double spending practically impossible. He explores the strongest arguments for and against Bitcoin's solution, then walks through what we know, what we don't know, and why this matters for ordinary people trying to understand whether Bitcoin is truly money.