I’ve been running this site for almost 10 years, and I can’t believe we never had a “what is bitcoin” guide. Let’s be honest about the search side. This page will never rank for that term in Google or any AI engine. That’s fine, because it isn’t written for them. It’s written for the people who land on AirdropAlert while they’re still new to crypto.
There’s also a personal reason. I’ve held bitcoin since my first purchase in 2013, and it changed my life. So I feel I owe something back to the community. If one person reads this and finally gets it, the guide did its job.
What Is Bitcoin?
Bitcoin is a digital currency that runs without a bank, company or government in charge. It lives on a public network of computers that all keep the same record of who owns what. Nobody can print more of it, and nobody needs permission to send it. There will only ever be 21 million bitcoin.
In plain words, bitcoin is money you can hold yourself. You can send it to anyone in the world, at any hour, without asking a middleman.
How Bitcoin Works
Every bitcoin transaction gets recorded on a shared ledger called a blockchain. If that word is new to you, our guide on what a blockchain is covers the basics.
Here is the short version. Thousands of computers around the world, called nodes, store a full copy of that ledger. Whenever someone sends bitcoin, the network checks that the coins exist and haven’t been spent already.
Next, miners bundle those transactions into blocks. A new block gets added roughly every ten minutes. To add one, miners compete to solve a hard math puzzle using a lot of computing power. This system is called proof of work. The winner earns newly created bitcoin plus the fees from that block.
Because so many independent machines check every block, cheating the system is extremely expensive. That’s where the security comes from. I still run a small miner on my desk today. It doesn’t earn much, but I feel like I’m contributing to the network.
To own bitcoin, you hold a private key in a wallet. Whoever controls the key controls the coins. For that reason, learning the difference between a seed phrase vs private key is one of the first things worth doing.
Why the Supply Is Fixed
Bitcoin has a hard cap of 21 million coins, and the code enforces it. No central bank can decide to make more.
New coins only enter circulation through mining. On top of that, the reward miners receive gets cut in half about every four years. This event is called the halving. The most recent one happened in April 2024, and the next is expected around 2028.
You also don’t need to buy a whole bitcoin. Each coin splits into 100 million units called satoshis, or sats. Many people start with a few dollars’ worth.
Who Created Bitcoin?
Nobody knows for sure. Bitcoin was created by someone using the name Satoshi Nakamoto. The whitepaper came out on October 31, 2008, and the network went live in January 2009.
Satoshi stopped posting around 2011 and never came back. Even so, the coins mined in those early days still sit untouched. We dug into how many bitcoin Satoshi owns in a separate post. If you like early history, the story of the first bitcoin transaction is a fun place to start.
Why Bitcoin Clicked for Me
My click moment wasn’t about price. It was about the idea of an alternative to the financial system.
Back then I played poker online for a living. Moving money between my bank and online poker sites got my accounts frozen more than once. Every time, I had to explain where my own money came from. Honestly, it felt like an invasion of privacy.
Bitcoin showed me a different route. Nobody could freeze my wallet. Nobody controlled my funds except me. On top of that, it felt like a hedge. Slowly, I was getting more worried about banks and inflation, and here was money with a fixed supply.
One caveat for beginners. That freedom only applies when you hold your own keys. Coins on an exchange can still be frozen, just like a bank account.
What You Could Do With Bitcoin Back Then
In the early days there wasn’t much to do with it. You could hold it or trade it. Exchanges like Poloniex even let you earn interest, which I wrote about in my post on Poloniex lending.
You could also mine. Mining at home was still a thing for a while, and it left me with some stories, like the Dogecoin miners and a lost wallet.
For poker players, bitcoin had a practical use too. It worked well as an intermediate currency, settled OTC, to move funds between poker sites.
Over the years, restaurants, stores and merchants slowly started accepting it. I made it a personal mission to spend some sats at each one I found, just to support the ecosystem. It was fun, and it felt like being part of a movement. One of those meals became my bitcoin sushi story.
Bitcoin on the Road
For years I traveled the world. Whenever I could, I swapped bitcoin for local currency. It was nothing crazy, a few hundred dollars here and there as pocket money.
Those swaps introduced me to interesting people everywhere, all with a shared interest. In early 2017, for example, I met a guy at a local Starbucks in Cape Town and swapped some bitcoin for South African rand. Afterwards he invited me to a bar, and we hung out for the evening. Without bitcoin, that night would never have happened.
Bitcoin Today
A lot has changed since those Starbucks deals. In January 2024, US regulators approved spot bitcoin ETFs. Now pension funds, banks and public companies hold bitcoin too.
The network itself barely changed, and that’s the point. There have been splits along the way, covered in our bitcoin fork history, but the original chain kept its rules.
Bitcoin also isn’t the only crypto. Ethereum added smart contracts and apps on top of the idea, which our guide on what Ethereum is explains. And yes, there are even bitcoin airdrops now, which would have sounded crazy in 2013.
How to Get Your First Bitcoin
The easiest route for most people is a regulated exchange. You sign up, verify your identity, deposit money and buy. Our step-by-step guide on how to buy bitcoin for the first time walks through it.
After that, consider moving your coins to a wallet you control. Write your seed phrase on paper and never share it with anyone.
Risks to Know Before You Buy
Bitcoin’s price swings hard. Drops of 50% or more have happened several times. Only buy what you can leave alone through a bad year.
Scams are the other big risk. Nobody legit will ever ask for your seed phrase. Likewise, “doubling” offers and fake giveaways are always theft.
Finally, transactions can’t be reversed. Send to the wrong address and the coins are gone. Always check, and send a small test first.
Keep This Content Free
If this was your first step into bitcoin, you can help the next beginner find theirs. Sign up through our OKX or Bybit links. It costs you nothing extra and keeps guides like this free.
Final Words
When I first bought at $44, I couldn’t imagine where this would go. Years later, I’m full time in web3 and farming DeFi every day. All of it started with a simple idea: money nobody can freeze, with a supply nobody can inflate.
You don’t need to go all in to learn. Buy a small amount, send it to your own wallet and see how it feels. Then keep reading. Our knowledge base is a good next stop.
FAQ
What is bitcoin in simple terms?
Bitcoin is digital money that no bank or government controls. It runs on a global network of computers, and only 21 million coins will ever exist.
Who controls bitcoin?
Nobody controls it alone. Thousands of nodes and miners around the world follow the same rules and check every transaction.
Can I buy less than one bitcoin?
Yes. One bitcoin splits into 100 million satoshis, so you can buy a few dollars’ worth.
Is bitcoin safe?
The network has run since 2009 without being broken. Most losses come from scams, lost keys or hacked exchanges, so protect your seed phrase.
Why does bitcoin have value?
It’s scarce and hard to censor, and it works anywhere in the world. Over time, enough people and institutions trust those properties to hold it as a store of value.
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