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.
Editorial & research
News & Research
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.
Investing
Best Crypto Tax Software: What to Look For and the Main Options
How crypto tax software works, how it is priced, what to check before you pick one, and a balanced look at CoinLedger, CoinTracker and Koinly for US readers.
Security
Ledger vs Trezor: Which Hardware Wallet Fits You?
Ledger and Trezor differ on secure elements, open code, backups and Bitcoin-only options. See them side by side, with incident history and who each suits.
Security
Best Bitcoin Wallets: Types, What to Look For and the Main Options
No single bitcoin wallet is best for everyone. Compare the four wallet types, learn what to check before you trust one, and see the main options by type.