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What Is Bitcoin Mining? Get Free Bitcoins! (#34)





What Is Bitcoin Mining?

→ Related: What Is Bitcoin? Introduction to a Digital Currency(#33) — worth reading first if you haven't already.

What Is Bitcoin Mining, in Simple Words? How Do New Bitcoins Enter the Market?

Bitcoin Mining is the process through which new bitcoins are created and enter circulation — it's the only mechanism by which new Bitcoin supply comes into existence.

How Many Bitcoins Are There in Total?

Bitcoin has a hard-capped total supply of 21 million coins, built into its underlying code. As of mid-2026, roughly 20 million have already been mined — over 95% of the total supply. The remaining coins are released on a slow, decelerating schedule (via a mechanism called "halving," which cuts the mining reward roughly every four years), and the very last fraction of a bitcoin isn't expected to be mined until around the year 2140.

Worth knowing: not every mined bitcoin is actually usable. An estimated 2–4 million BTC are believed to be permanently lost — inaccessible due to lost private keys or forgotten recovery phrases — meaning the real, spendable supply is meaningfully lower than the raw "mined" figure suggests.

Millions of people today trust and invest in Bitcoin, and that collective trust is a real part of why it's grown as popular as it has. Understanding how it actually works is worth the effort.

How Does Bitcoin Mining Actually Work?

Bitcoin runs on a peer-to-peer transaction system — no bank or intermediary sits in the middle of a transaction. Normally, when you send money through a bank, the bank verifies your account details, checks your balance, takes a transaction fee, and keeps a record of the transaction. Bitcoin handles this differently: transaction fees tend to be lower, and there's no central institution doing the verification.

Instead, verification is handled by other participants on the network, who contribute computing power to validate transactions. Why would someone volunteer their computing power for this? Because whoever successfully validates a transaction is rewarded with newly created bitcoin (or a fraction of one) — this whole process is what's known as Bitcoin Mining.

Can Individuals Still "Mine" Bitcoin for Free Today?

This is the part that needs the most updating from how it may have worked in Bitcoin's earliest years. In Bitcoin's early days, mining with an ordinary home computer was genuinely viable.

That's no longer the case today. Bitcoin mining is now dominated by large-scale, industrial operations using highly specialized hardware (ASIC miners) that consume enormous amounts of electricity. For an individual today, mining with a regular computer isn't remotely competitive, and once you factor in hardware and electricity costs, home mining generally isn't profitable — so while no direct payment is required to participate, calling it "free" doesn't really reflect the real economics involved anymore.

Did You Know? Can Bitcoin Be Hacked?

This deserves a more precise answer than a flat "no." Bitcoin's underlying blockchain — the public, shared ledger recording every transaction ever made — is genuinely well-designed from a security standpoint, and the core protocol itself has not been successfully hacked. Every transaction is publicly viewable (you can browse them at bitcoin.org or various blockchain explorers), though the identities behind those transactions aren't directly exposed — part of what makes the system interesting.

However, that's different from saying Bitcoin holders can't lose their coins. Cryptocurrency exchanges have been hacked multiple times over the years, with billions of dollars lost across various incidents, and individual wallets get compromised through phishing, malware, or simple loss of access. So: the core network is robust, but that doesn't mean your own coins are automatically safe — how and where you store them matters a great deal.

That covers the basics of how Bitcoin mining works, where new bitcoins actually come from, and a few things worth knowing about its security. Thanks for reading.

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