Lessons
Everything we teach,
organized by pillar.
Read in any order, or take the 90-second quiz and we'll sequence the right ones for you. New here? Filter to Beginner and nothing will be over your head.
Foundations
Plain-English mental models. The right starting point if nothing has clicked yet.
- 01NewWhat a blockchain actually is
A blockchain is a public notebook where every page is sealed by everyone, not the bank. Here's how that mental model holds up under pressure.
7 minBeginner
- 02NewWallets, keys, addresses, and how to keep them straight
Three words people use as if they mean the same thing. They do not. Once you see the difference, the rest of self-custody stops feeling like guesswork.
8 minBeginner
- 03NewYour first transaction (in a sandbox)
Sending a transaction is not like sending an email. The differences are exactly the things that bite first-timers. We walk through every step, in a place where mistakes are free.
9 minBeginner
Self-custody
Holding your own keys without losing sleep. Threat models, hardware, hygiene.
- 01NewWhat self-custody actually is
Self-custody is one sentence. The hard part is what the sentence implies. We pull that thread all the way down.
9 minBeginner
- 02NewYour real threat model, in plain English
A threat model is not a checklist of scary words. It is a ranked list of what is actually likely to take your coins. Once you have one, every security decision gets easier.
9 minBeginner
- 03NewSeed phrase hygiene that survives a fire
The seed phrase is the master key to everything you own. Most people back it up wrong on day one and never revisit. Here is what surviving a real failure looks like.
9 minBeginner
- 04NewHardware vs software wallets
A hardware wallet is not magic. A software wallet is not unsafe. The real question is which threats each one actually addresses, and which ones it leaves open.
10 minBeginner
- 05NewExchanges vs wallets: what you actually own
Holding crypto on an exchange and holding crypto in your own wallet are not the same thing. They are not even adjacent. We separate them properly, so you can decide what belongs where.
8 minBeginner
Threats
How attackers actually work. Phishing, address poisoning, social engineering.
- 01NewPhishing 101: what every attacker tries first
Phishing is not a clever exploit. It is a conversation that ends with you handing over the keys. We break down the conversation so you can hear it coming.
9 minBeginner
- 02NewThe scams everyone falls for
Most crypto scams are not new. They are old confidence tricks dressed in technical language. Here are the ones that catch smart people, why they work, and how to recognize them on the way in.
8 minBeginner
Inheritance
What happens to your crypto if you're not here. Shamir, Lazarus, documented plans.
- 01NewWhy most crypto dies with its owner
A staggering fraction of all crypto ever held has already been lost forever, and most of it was lost the same way. Someone died, and nobody else knew enough to recover the keys. Here is why, and what to do before it is your turn.
9 minBeginner
- 02NewWhat to tell your spouse, and what not to
The conversation about crypto with the person you live with is the highest-leverage thing you can do for your inheritance plan. It is also the conversation people put off for years. Here is how to have it well, and how much to tell.
8 minBeginner
Ownership
DOTs, RWAs, fractional ownership, self-sovereign distribution for creators.
- 01NewDOT, not NFT, and why it matters
Most people who say "NFT" mean a digital collectible. The category that actually matters is broader, and the term that fits it is DOT. We separate the two cleanly.
9 minBeginner
- 02NewPlatform risk for creators, ranked
Every creator on a major platform is one policy change away from losing significant work. We rank the actual risks, from the obvious to the underappreciated, and lay out the defensive moves that work.
8 minBeginner
DeFi basics
DEXs, swaps, gas, slippage, MEV, taught in a sandbox before you spend a cent.
AI security
Prompt injection, agent permissions, model risk, data exposure. The threats aimed at the people using AI.
- 01NewHow scammers use AI now
AI did not invent fraud. It made the old scams cheaper, faster, and far more convincing. Here is what actually changed, and what did not.
8 minBeginner
- 02NewDeepfakes and voice clones, explained
A thirty-second clip of someone speaking is now enough to fake their voice. Here is how the fakes work, where they fail, and the one defense that does not depend on your ears.
9 minBeginner
- 03NewSpotting fake support and fake profiles
The fastest way to lose self-custodied funds today is to ask for help in public and trust whoever answers. Here is how the fake-support trap works and how to stay out of it.
8 minBeginner
Blockchain security