21 BTCThere will only ever be 21 million
The limit is written into the rules every Bitcoin computer checks. New coins appear on a public schedule and halve every four years. Over 19.9 million already exist; the last fractions arrive around the year 2140.
Orange pill · for newcomers and their friends
Why Bitcoin? The short, honest version
Five minutes, no jargon, no price predictions. What Bitcoin is, the doubts people usually have, and how to start without getting burned.
21,000,000bitcoins, ever. That number never changes.
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Bitcoin in plain words
No one can print more
There is no company, bank or government that runs Bitcoin. Changing the 21 million limit would need tens of thousands of independent node operators to agree, and they have every reason not to. Dollars, rubles and euros are issued by central banks, and over time each unit tends to buy less.
You can hold it yourself
Your bitcoin is controlled by a secret list of 12 or 24 words (a seed phrase). Whoever has the words controls the coins: no bank can freeze them, and no one can take them without the words. That also means you are responsible: lose the words and no one can restore them.
Open to anyone, everywhere
You need no permission, account or minimum amount. One bitcoin divides into 100 million sats, so you can start with the price of a coffee and send it across the world, 24/7.
10 common doubts, answered honestly
Some of these doubts are fair. Here is what is true, what is not, and where the numbers come from.
“It wastes a huge amount of energy”
Mining does use a lot of electricity: Cambridge estimates about 138 TWh a year, roughly 0.08% of global greenhouse-gas emissions. That energy is what makes the ledger expensive to attack. In Cambridge's 2025 survey, 52.4% of miners' power came from renewables and nuclear, and miners often use cheap surplus power and switch off when the grid needs it.
Sources: Cambridge Digital Mining Industry Report (2025) · Cambridge Bitcoin Electricity Consumption Index
“The price jumps around too much”
True. Bitcoin has fallen 70–80% from a peak several times, most recently from November 2021 to November 2022. It is a young, small asset compared with gold or stocks. Only put in money you will not need for years, and never borrow to buy. Buying small amounts regularly (DCA) smooths the ride but does not remove the risk.
Sources: 21 BTC: halving cycles and drawdowns
“I'm too late, it's already expensive”
No one knows the future price, and anyone who promises one is guessing. What you can know: you don't have to buy a whole coin, the supply is fixed, and the network keeps working the same way for everyone. Learn first, start small, and decide for yourself.
Sources: 21 BTC: sats calculator
“It's mainly for criminals”
Chainalysis estimates that illicit addresses received about 0.14% of all on-chain crypto volume in 2024 (all coins, not only bitcoin), and historically under 1%. Every bitcoin transaction is public forever, which is why police regularly trace and seize criminal funds. Cash remains the main tool for crime.
Sources: Chainalysis 2025 Crypto Crime Report
“Governments will just ban it”
Some have tried. The US Library of Congress counted 9 countries with an outright ban and 42 with partial bans in 2021, including China. The network kept running: there is no central server to switch off. Rules differ by country and change, so check your local law and taxes before you buy.
Sources: Library of Congress: Regulation of Cryptocurrency Around the World (2021)
“Quantum computers will break it”
Today's quantum computers are far too small to break Bitcoin's signatures. A large future machine could be a real risk, mainly for coins whose public keys are already visible on-chain. Developers are preparing: BIP-360 (Pay-to-Merkle-Root), a draft for a quantum-resistant output type, was added to the official proposals list in 2026. Bitcoin can upgrade by consensus, as it did with SegWit and Taproot.
Sources: BIP-360: Pay-to-Merkle-Root (draft)
“Why bitcoin and not some other coin?”
There are thousands of coins. Most have a founder, company or foundation that can change the rules, kept a share for insiders, or issue more over time. Bitcoin had no premine, its creator disappeared, and it has run since 2009 with the longest record and the most independent nodes. Other coins may be interesting tech, but they are a different bet.
“It's backed by nothing”
Neither is modern paper money: since 1971 major currencies are not backed by gold, only by trust in their issuer. Bitcoin's value comes from its properties: it is scarce, easy to verify, easy to move and hard to seize. Whether that is worth something is decided by people who choose to use it.
Sources: Wikipedia: Fiat money
“It gets hacked and people lose everything”
The Bitcoin network itself has not been taken over; a serious bug in 2010 was fixed within hours. Most losses happen at exchanges and through scams, fake apps and leaked seed phrases. Move savings to your own wallet, write the words on paper, and never type them into a website.
Sources: 21 BTC: hacks and losses · 21 BTC: security guides
“It's too slow and expensive to pay with”
A regular on-chain payment settles in about 10 minutes to an hour, with fees that change with demand. For small everyday payments there is the Lightning Network: payments arrive in seconds and usually cost a few sats.
Sources: mempool.space (live fees) · 21 BTC: Lightning
Start in 5 minutes
- 1See it in satsCheck how many sats $10 or 1,000 rubles buys today. No need for a whole coin.
- 2Buy safelyUse a well-known exchange, turn on two-factor login, and ignore anyone who “helps” you invest.
- 3Get your own walletMove what you keep to a wallet only you control. For larger amounts, a hardware (cold) wallet.
- 4Buy a little, regularlyDCA: a fixed small amount every week or month, whatever the price. See how it worked in the past.
- 5Keep learningBasics, a glossary and security guides in plain words.
Golden rules: never share your seed phrase, never send coins to someone promising returns, start with an amount you could afford to lose.
Read and listen
Books
- The Little Bitcoin Book · Bitcoin Collective (Timi Ajiboye, Luis Buenaventura, Alex Gladstein, Lily Liu, Alexander Lloyd, Alejandro Machado, Jimmy Song, Alena Vranova) · 2019About 100 pages, no jargon. The best first book to give a friend.
- Inventing Bitcoin · Yan Pritzker · 2019How Bitcoin works, step by step, in a short read.
- The Bitcoin Standard · Saifedean Ammous · 2018The history of money and why sound money matters. Opinionated.
- Broken Money · Lyn Alden · 2023Why the money system works the way it does, and where Bitcoin fits.
- Mastering Bitcoin (3rd ed.) · Andreas M. Antonopoulos, David A. Harding · 2023The technical deep dive, free to read online.
Podcasts
- What Bitcoin Did · Danny Knowles (founded by Peter McCormack)Long interviews with builders, economists and critics.
- TFTC · Marty BentNews and conversations from inside the Bitcoin world.
- Stephan Livera Podcast · Stephan LiveraBitcoin economics, privacy and technology.
- Bitcoin Audible · Guy SwannThe best Bitcoin articles, read aloud.
All in English. Our own guides are in English and Russian: Learn →
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I thought you might like this: Bitcoin in 5 minutes, in plain words. Why there are only 21 million, honest answers to the usual doubts, and how to start safely.
Educational only, not investment advice. Bitcoin's price can fall a lot; no one can promise what it will be worth. Check the rules and taxes in your country.