"Isn't Bitcoin risky? I heard someone got hacked and lost everything." It's one of the most common things we hear from people considering Bitcoin for the first time. It's a completely reasonable concern — and it deserves a direct, honest answer.
The short version: Bitcoin the network has never been successfully hacked in 16 years of operation. But people lose Bitcoin all the time — usually not because Bitcoin was compromised, but because of mistakes made by humans or the companies they trusted. Understanding the difference is crucial.
Bitcoin the network vs Bitcoin services
This is the most important distinction in all of Bitcoin security. When you hear about a "crypto hack," you're almost never hearing about Bitcoin's underlying protocol being compromised. You're hearing about an exchange, a wallet app, or a third-party service being attacked.
Bitcoin the network
The base protocol — the blockchain, the mining network, the consensus rules. This has operated continuously since January 2009 without a single successful attack on the core protocol. It processes billions of dollars in transactions daily.
Bitcoin services
Exchanges, wallets, custodians, apps — the companies built on top of Bitcoin. These are run by humans and have human-scale security. Several have been hacked. The Bitcoin underneath was not affected.
When FTX collapsed in 2022, losing billions of dollars of customer funds, Bitcoin didn't fail. The exchange failed — through a combination of fraud and mismanagement. The people who held Bitcoin in self-custody (their own wallets, their own keys) were completely unaffected. The people who trusted FTX to hold their Bitcoin on their behalf lost everything.
Why is the Bitcoin network so secure?
Bitcoin's security comes from a combination of cryptography and decentralisation that makes attacking it extraordinarily costly.
Cryptographic security: Every transaction on Bitcoin is secured by SHA-256 encryption — the same standard used by governments and banks worldwide. To forge or alter a transaction, you would need to break this encryption. The computing power required is literally incomprehensible — more than all the world's computers combined, running for thousands of years.
"Attacking Bitcoin's cryptography is not impractical — it's physically impossible with any technology that exists or is plausible in the near future. The maths genuinely doesn't allow it."
Decentralisation: Bitcoin runs on tens of thousands of computers worldwide. There is no central server to attack. To rewrite Bitcoin's transaction history, you would need to control more than 50% of all the computing power in the network simultaneously — a "51% attack." Bitcoin's mining network currently consumes more energy than many countries. The cost of acquiring enough hardware to attempt a 51% attack would be in the hundreds of billions of dollars — and even then, the attack would be noticed immediately and the network would respond.
Bitcoin has operated continuously since 3 January 2009 — processing trillions of dollars in transactions — without a single successful attack on its core protocol. No other financial infrastructure in history can claim a comparable security record at this scale.
So where do people actually lose Bitcoin?
Almost always, the vulnerability is human — not technical. Here are the most common ways people lose Bitcoin:
Trusting an exchange
Leaving Bitcoin on an exchange means the exchange holds your keys. If they're hacked, go bust, or freeze withdrawals, your access to your Bitcoin depends on them. "Not your keys, not your coins."
Losing your seed phrase
If you hold your own Bitcoin but lose or destroy your seed phrase, there is no recovery. No customer service line. No password reset. The Bitcoin remains on the blockchain, permanently inaccessible.
Phishing and scams
Fake websites, fake wallets, fake "support staff" asking for your seed phrase. Bitcoin itself is not compromised — people are tricked into handing over their keys. Never share your seed phrase with anyone, ever.
Malware
Software designed to steal private keys from unsecured devices. This is why hardware wallets exist — they keep your keys isolated from internet-connected devices, even if your computer is compromised.
What does "secure" Bitcoin ownership actually look like?
The gold standard is self-custody with a hardware wallet and a properly stored seed phrase. Your private keys never touch an internet-connected device. Your seed phrase is written on paper or stamped in metal, stored somewhere safe from fire and flood. You're the only person in the world who can access your Bitcoin.
The most important sentence in Bitcoin security
Never, under any circumstances, share your seed phrase with anyone. Not a "support agent." Not a friend. Not a family member helping you set things up. Not someone from an exchange. Not someone on the phone claiming your account is at risk.
Anyone asking for your seed phrase is attempting to steal your Bitcoin. There is no legitimate reason for anyone else to need it. This single piece of knowledge prevents the vast majority of Bitcoin theft.
Bitcoin's security model puts responsibility in the hands of the individual — which is both its greatest strength and its greatest challenge. There's no bank to call if something goes wrong. But there's also no bank that can freeze your account, deny your transaction, or confiscate your funds.
Like most things worth having, it rewards those who take the time to understand it properly. Which is exactly why we run these meetups.
Come and learn how to hold Bitcoin properly.
Our next meetup is the second Monday of the month, 6:00pm – 9:00pm. We'll walk you through wallets, seed phrases and security basics in plain English. In person in Bendigo or join us remotely.
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