Security
The Altruists on Netflix: The FTX Series and What the Collapse Teaches
The Altruists, Netflix's scripted FTX drama, premieres on 19 November 2026. What it covers, what really happened at FTX and what it teaches about custody.
Editorial & research
News & Research
Investing
Can You Buy Bitcoin With PayPal? Options, Limits and Cautions
PayPal lets eligible US customers buy, hold and sell Bitcoin in its app. See what holding means, other ways to pay with PayPal, taxes and the scams to avoid.
Technology
What Is a Bitcoin Transaction ID (TXID)? How to Read One
A TXID is the 64-character code that identifies one bitcoin transaction. Learn where to find it, how to read it on a block explorer and how to share it safely.
Technology
What Is a Bitcoin Block? Size, Time and What's Inside
A Bitcoin block bundles confirmed transactions and links to the block before it. See what's inside, how often blocks arrive and why their size is limited.
Technology
Double Spending and 51% Attacks: What They Are and Why Bitcoin Resists Them
Double spending means spending the same coins twice. Learn how Bitcoin prevents it, what a 51% attack could and could not do, and how confirmations protect you.
Security
How to Store Bitcoin: Exchange, Wallet or Cold Storage?
Where should you keep bitcoin? Compare exchanges, software wallets, hardware wallets and multisig, decide how much goes where and set up a first wallet safely.
Technology
When Is the Next Bitcoin Halving? Estimated Date and What Changes
The next Bitcoin halving is the fifth, at block 1,050,000, expected around April 2028. See how the date is estimated, why it moves and what the halving changes.
Bitcoin Basics
What Is Cryptocurrency? How It Works and Where Bitcoin Fits
Cryptocurrency is a digital asset on a shared ledger, secured with cryptography. See how it works, the main kinds, the risks and where Bitcoin fits.
Technology
How Long Does a Bitcoin Transaction Take? Confirmations and Fees Explained
A bitcoin payment is confirmed when a miner puts it in a block, about every ten minutes on average. Learn what confirmations mean and why waits vary.
Investing
What Is Dollar-Cost Averaging? How It Works With Bitcoin
Dollar-cost averaging means buying a fixed dollar amount at regular intervals. See how it works with bitcoin, what it does not do, and how fees and taxes apply.
Bitcoin Basics
Who Owns the Most Bitcoin? Holders, Whales and Why the Data Is Fuzzy
Nobody can say for certain who owns the most bitcoin. See the main kinds of holders, what a whale is and why an address is not a person.
Investing
Koinly Review: What It Does, How It Charges and Who It Suits
A balanced Koinly review for US readers: what the crypto tax software does, how its plans are priced, where it struggles and who it suits.