Index of every page

Crypto Basics

• Coins vs tokens: what's the difference? — Native coins run their own blockchain; tokens live on someone else's. Why that changes fees and risk.
• Crypto Basics — Start here if you are new to crypto: what a blockchain is, how Bitcoin and Ethereum work, and how wallets and transactions really function.
• Crypto wallets explained: custodial vs self-custody — Wallets hold keys, not coins. Custodial vs self-custody, hot vs cold, and how each can fail.
• How do crypto transactions work? — One payment from signature to confirmed block, with the Bitcoin and Ethereum differences explained.
• How to read a crypto whitepaper — A checklist for judging a project's own document: problem, design, token numbers, risks and red flags.
• What is a blockchain? — A record book copied across many computers, where changing old pages is easy to spot.
• What is Bitcoin? — The first cryptocurrency: how payments are verified, why supply is capped, and what can go wrong.
• What is cryptocurrency? — Digital money kept on a shared ledger: how it works, how it differs from a bank account, and the risks.
• What is Ethereum? — A blockchain that runs programs: ether, gas fees, smart contracts and what the Merge changed.

Networks & Ecosystems

• Ethereum rollups explained: optimistic vs zero-knowledge — Optimistic vs zero-knowledge rollups: fraud proofs, validity proofs, blobs and the seven-day exit.
• Layer 1 vs layer 2 blockchains: what is the difference? — Base chains settle; layer 2s batch transactions on top. What each layer does and who you end up trusting.
• Networks & Ecosystems — How the major networks differ: Bitcoin, Ethereum, Solana, rollups, Lightning and the trade-offs every blockchain design has to make.
• The blockchain trilemma explained — Scalability, security, decentralisation: why chains trade one for another, with real node-hardware numbers.
• What does EVM-compatible mean? — Chains that run Ethereum's virtual machine: what carries over, what differs, and where users slip up.
• What is a smart contract? — Programs that live on a blockchain and run as written: how they work, their limits and their risks.
• What is Solana? — A single fast layer 1: proof of history, parallel execution, lamport fees and the hardware trade-off.
• What is the Bitcoin Lightning Network? — Payment channels, routed payments and invoices on Bitcoin's layer 2 — and what you must watch for.

DeFi

• DeFi — Decentralized finance without the hype: how automated market makers, lending pools and oracles work, and the risks regulators keep flagging.
• How do decentralized exchanges work? — How a pool and a formula replace the order book — and why big trades get worse prices.
• How do DeFi lending and borrowing work? — Pools, collateral, health factor and liquidation — the mechanics behind on-chain loans.
• Liquidity pools and impermanent loss — Why a liquidity provider can trail a simple hold — with the numbers for every price move.
• What are the main risks of DeFi? — Exploits, oracle attacks, bridges, liquidations, governance and scams — and how to cut your exposure.
• What is a blockchain oracle? — How prices and other outside data reach smart contracts — and what happens when they are wrong.
• What is DeFi? — Financial services run by smart contracts: how they work, who controls them and where the risks hide.
• What is TVL (total value locked)? — How DeFi's headline size figure is calculated, why it double-counts, and what it cannot tell you.

Stablecoins & Payments

• Fiat-backed, crypto-backed and algorithmic stablecoins — Fiat-backed, crypto-backed and algorithmic designs side by side, with the failure mode of each.
• How are stablecoins used in cross-border payments? — The on-ramp, the chain and the off-ramp: where costs and risks sit when money crosses borders as tokens.
• How do stablecoins keep their peg? — Primary vs secondary markets, arbitrage with real fee schedules, and the three things that break a peg.
• Stablecoin reserves and attestations explained — Attestation vs audit vs proof of reserves, what US rules require, and a five-step way to read a report.
• Stablecoins & Payments — What stablecoins are, what backs them, how they keep their peg, how reserves are checked, and why some have collapsed.
• USDT vs USDC: how do they differ? — Issuer, licence, reserves, reports, redemption and freeze rules, compared side by side from primary documents.
• What happened to TerraUSD (UST)? — The UST–LUNA design, the 2021 rescue, the 2022 run, and what the SEC and DOJ found afterwards.
• What is a stablecoin? — Tokens designed to stay at $1: what backs them, how redemption works, and why runs happen.

Fintech

• Buy now, pay later (BNPL) explained — How pay-in-four works, what late payments cost, why stacking loans matters, and the new UK rules.
• Digital banks vs traditional banks — Licensed bank or app with a partner bank? What it means for deposit insurance and failures.
• Fintech — How modern money moves: card networks, open banking, digital banks, buy now pay later, instant payment systems, CBDCs and robo-advisers.
• How do card payments work? — Issuer, acquirer and network explained, plus who pays interchange and how disputes work.
• Instant payment systems: FedNow, Pix and UPI — How 24/7 account-to-account payments work, and how the US, Brazil and India built theirs.
• Robo-advisers explained — How automated investment advice works, what it really costs, and how to check the firm.
• What is a central bank digital currency (CBDC)? — Digital money owed by a central bank: how it differs from deposits and stablecoins, and who is building one.
• What is fintech? — What the word covers, how fintech apps plug into banks, and which protections change.
• What is open banking? — How consent-based bank data sharing and pay-by-bank work, and the rules in the UK, EU and US.

Markets & Macro

• Bull vs bear markets: what is the difference? — The 20% rule, corrections, recovery math and how crypto's booms and busts compare.
• How do interest rates affect stocks, bonds and crypto? — From the policy rate to bond prices, share prices and crypto: what is established and what is debated.
• Markets & Macro — The big forces behind prices: inflation, interest rates, ETFs, market cap, liquidity, volatility and market cycles — explained from official sources.
• What is a spot bitcoin ETF? — Exchange-traded products that hold bitcoin: how they work, what they cost, what they don't fix.
• What is an ETF? — A fund you trade like a share: creation and redemption, costs, and ETF vs mutual fund.
• What is inflation? — How the CPI and HICP turn price tags into one number, what drives inflation, and who it hurts.
• What is market capitalization? — Price × supply: size bands for stocks, and why crypto market caps can overstate real money.
• What is market liquidity? — Tightness, depth and resiliency: how much it really costs to trade, and why liquidity dries up in a crisis.
• What is volatility? — Standard deviation, beta and the VIX in plain numbers — and why big swings cost you even when averages look fine.

Regulation

• How is crypto taxed? The basics — Taxable events, cost basis and the new exchange reporting rules, explained with US and UK examples.
• How to check if a financial platform is registered — Six steps to verify a broker, adviser or crypto platform in official registers — and spot clone firms.
• KYC and AML explained — Why banks and crypto exchanges verify your identity, what they check and which reports they file.
• MiCA explained: the EU's crypto-asset rulebook — The EU's crypto rulebook: token types, issuer duties, exchange licences and the dates that matter.
• Regulation — Who regulates crypto and fintech: SEC vs CFTC, the EU's MiCA, KYC and AML rules, the Travel Rule, the GENIUS Act and crypto tax basics.
• SEC vs CFTC: who regulates crypto in the US? — Securities vs commodities, spot vs derivatives: how the two US agencies divide crypto oversight.
• The FATF travel rule for crypto — Why exchanges ask who owns the receiving wallet, what data travels with your transfer, and the thresholds.
• The GENIUS Act: the US stablecoin law explained — Reserves, licences, the yield ban and the timeline of the US payment stablecoin law.

Security & Privacy

• Common crypto scams and how to spot them — Fake platforms, giveaways, impostors and recovery scams: how they work and the signs they share.
• Hardware vs software wallets — Online keys versus offline keys: the trade-off between convenience and exposure, explained.
• Phishing and address poisoning in crypto — Lookalike sites and lookalike addresses: how both scams work and the habits that defeat them.
• Security & Privacy — Protect your money: seed phrases, hardware and software wallets, common scams, pig butchering, phishing, address poisoning and token approvals.
• Seed phrases explained — What the 12 or 24 recovery words actually encode, and how to keep them out of reach.
• Token approvals and wallet drainers — What you allow when you click Approve, how drainers exploit it, and how to revoke old permissions.
• Two-factor authentication for money accounts — SMS codes, authenticator apps, passkeys and security keys compared for bank and crypto accounts.
• What is a pig butchering scam? — A fake relationship, a fake trading platform and a scripted ending: the stages and the red flags.

Mining, Staking & Infrastructure

• Cross-chain bridges explained — Lock-and-mint, burn-and-mint and swaps: how bridges move tokens, and why they are a favorite target for hackers.
• How does Bitcoin mining work? — What miners compute, how difficulty keeps blocks near 10 minutes, and why most miners join pools.
• Liquid staking explained — Receipt tokens for staked ETH: rebasing vs wrapped designs, withdrawal queues, discounts and smart contract risk.
• Mining, Staking & Infrastructure — How blockchains stay running: proof of work vs proof of stake, bitcoin mining, the halving, staking, liquid staking, nodes and bridges.
• Proof of work vs proof of stake — Two ways to pick who writes the next block — and what each one asks an attacker to put on the line.
• The Bitcoin halving explained — The 210,000-block rule that halves new supply, the math behind the 21 million cap, and the price myths.
• What is a blockchain node? — Full, light and archive nodes, what each verifies, and what running one for Bitcoin or Ethereum takes.
• What is staking? — How locked-up coins secure proof-of-stake chains, the four ways to stake ETH, and what can go wrong.

Asset Profiles

• Asset profiles — Plain fact files on major crypto-assets — what each one is, who issues or runs it, key dates and specific risks. No live prices, no rankings.
• Avalanche (AVAX) — Avalanche's three chains, the 720 million AVAX cap, staking minimums and upgrades since 2021.
• Bitcoin (BTC) — Who created it, the 21 million supply rule, halvings by block height and the risks of holding BTC.
• Cardano (ADA) — Cardano's 2017 genesis, its eras and hard forks, the supply limit and who votes on changes.
• Chainlink (LINK) — What the Chainlink oracle network does, what LINK pays for, how staking works and its risks.
• Dai (DAI) — How Vaults create Dai, who votes on the rules, the USDS upgrade and what can break the peg.
• Ether (ETH) and the Ethereum network — Who created Ethereum, how ETH is issued and burned, the Merge and other upgrades, and holder risks.
• Litecoin (LTC) — Scrypt mining, 2.5-minute blocks, the 84 million supply schedule and optional MWEB privacy.
• Polkadot (DOT) — How Polkadot's staking and coretime work, the 2.1 billion DOT cap and the risks of holding DOT.
• Solana (SOL) — Who built Solana, how SOL is issued and burned, key dates since 2017 and the risks of holding it.
• Tether (USDT) — Who issues USDT, how redemption works, what the reserves are and what regulators found.
• USD Coin (USDC) — Who issues USDC, how Circle Mint works, what backs it and what the 2023 bank failure showed.
• XRP and the XRP Ledger — Who built the XRP Ledger, how its fixed starting supply and fee burn work, key dates and the risks.

Glossary

• APR vs APY: what is the difference? — Simple rate versus compounded yield, with the official formula and a worked example.
• Glossary A–Z — Plain-English definitions of the crypto, payments and markets terms you will meet — from address and APY to slippage and spread.
• Hard fork vs soft fork: what is a fork? — How blockchains change their rules, and when a change splits the network.
• What does depeg mean? — When a stablecoin slips from $1: causes, the 2023 USDC case and the UST collapse.
• What is a block explorer? — The search engine for a public blockchain, and how to read a transaction page.
• What is a crypto address? — The public string that receives coins and tokens, how it is derived and how to check it.
• What is a crypto airdrop? — Tokens sent to many wallets at once — the tax angle and the scam angle.
• What is a gas fee? — What you pay to get an Ethereum transaction processed, with the formula worked through.
• What is a hash function in blockchain? — The fixed-length fingerprint behind blocks, addresses and mining.
• What is a multisig wallet? — Wallets that need several keys to sign, and what an m-of-n set-up protects against.
• What is a private key? — The secret that signs transactions, how it links to addresses, and why it cannot be reset.
• What is a rug pull? — When project creators raise money and disappear with it — how it works and the warning signs.
• What is an interchange fee? — The per-transaction fee paid to the card issuer, with US and EU caps worked through.
• What is cold storage in crypto? — Keeping private keys offline: hot vs cold wallets and the risks of each.
• What is slippage in crypto? — Why a swap fills at a different price than quoted, and how slippage tolerance limits it.
• What is the bid-ask spread? — The gap between buy and sell prices, and how to turn it into a cost you can compare.
• What is the mempool? — The waiting room for unconfirmed transactions, and how fees decide who goes next.

Tools

• APR to APY converter — Turn a nominal APR into the yearly yield with compounding, or reverse it.
• Calculators — Free calculators that show their working: compound interest, APR to APY, inflation, crypto profit after fees, DCA and currency conversion costs.
• Compound interest calculator — Starting sum plus monthly deposits at a fixed rate, with the formula and a worked example.
• Crypto profit calculator (with fees) — Profit or loss after buy and sell fees, plus the break-even sell price.
• Currency conversion fee calculator — Total cost of a conversion: fixed fee plus the rate markup against the mid-market rate.
• Dollar-cost averaging (DCA) calculator — Average cost, units and gain or loss when you buy a fixed amount at a list of prices.
• Inflation and purchasing power calculator — How much a sum loses in buying power at a steady yearly inflation rate, with the formula.

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• Risk disclosure — Crypto-assets are high-risk and can lose all their value. What the main risks are, what regulators warn about, and why nothing here is advice.
• Start here — New to crypto or fintech? Follow this four-stage reading path, from what a blockchain is to how stablecoins, DeFi and regulation fit together.
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Other

• All sections — All ten Protocol Insights sections in one place: crypto basics, networks, DeFi, stablecoins, fintech, markets, regulation, security, infrastructure, assets.