10 Bitcoin Mining Myths, Checked Against the Real Numbers

Bitcoin mining is full of half-truths: laptops, halvings, illegal mining, the end of mining. We checked 10 of the most common myths against live network data and real Bitcoin miners.

By Michal Beno, CEO, OneMiners29 October 2026

This is the most repeated line about Bitcoin, and it is not quite right. A Bitcoin miner does not solve an equation. It takes the details of a new block, adds a random number, and runs it through a function called SHA-256. If the result is below a target, the miner wins the block. If not, it tries the next number. There is no shortcut and no clever answer. It is guessing, very fast: a modern Bitcoin miner makes hundreds of trillions of guesses every second. Our Proof of Work explainer shows it step by step.

You can install the software. You just will not find a block. Let us be generous and give a home graphics card 1 GH/s on Bitcoin's algorithm. The network does about a trillion times more. Here is the maths:

Even a top machine, alone, would wait about 35 years on average for a block. That is why real miners join a pool: the pool finds blocks every day and pays each miner a share. In a pool, the same S23 Hyd earns about $20.72 a day in Bitcoin at today's numbers, before power.

About 20.10 million Bitcoin exist today, or 95.7% of the total. The block reward halves every four years, so the last tiny fraction is expected around the year 2140. After that, miners are paid only with transaction fees, which users already pay with every transfer. Right now fees are small, about 0.48% of what miners earn. Mining does not end. It just changes how it is paid.

What a halving does is written in the code: the reward per block is cut in half. In April 2024 it fell from 6.25 to 3.125 BTC. What the price does next is not written anywhere. Past halvings were followed by price rises, but they also came with different markets, rates and news. A miner should plan for the halving as a 50% cut in coins, and treat any price rise as a bonus. See our 2028 halving countdown.

The opposite. Difficulty rises when more mining power joins and blocks start coming faster than every 10 minutes. On 16 October difficulty rose 5.92%, and another rise of about 6.3% is expected around 29 October. That is a network attracting new machines. For a single miner it means fewer coins for the same work, which is why efficiency matters. We covered it in what the 29 October jump means.

In most of the world it is legal. That includes the United States, Canada and most of Europe. A few countries ban it, and some cities and power companies limit it, for example by banning home mining or charging special tariffs. Mining income is usually taxable. Check where home mining is still legal and our mining tax guide before you start.

Price matters, but power costs come every day. Compare two real machines: the Antminer S21 200T costs $907 and uses 17.6 J/TH. The Antminer S23 Hyd 580T costs $12,299 and uses 9.5 J/TH. Here is what each keeps per day after power:

On a 13 cent home tariff the cheap S21 loses about $3.84 a day. The efficient S23 Hyd still keeps money. Our ranking of Bitcoin miners by break-even electricity price shows this for 14 models.

It feels cheaper because there is no hosting bill. But a typical home tariff of around 13 cents per kWh is 2.5 times the 5.2 cent hosting price at OneMiners, and 3.6 times the 3.6 cent 7-year prepaid price. Air-cooled Bitcoin miners are also about 75 dB loud, like a vacuum cleaner that never stops. Read the 75 dB problem before you plug one in at home.

With cloud mining you pay for a contract that promises hashrate somewhere. You cannot see the machine, and if the company stops paying, there is little you can do. With hosting, you buy a real Bitcoin miner with a serial number, it is installed at a professional site, and the payouts go to your own wallet. Our guide is cloud mining legit? and our scam warning signs explain how to tell them apart.

Some large listed mining companies are renting power to AI data centres, and that makes headlines. But the network itself is near its record: about 1,069 EH/s this week, and difficulty is rising again. When one company switches off, others switch on. For a small miner, that means Bitcoin mining is still competitive, and the winners are the ones with efficient machines and cheap power.

Antminer S23 Hyd 580T$12,299Hashrate580 TH/sEfficiency9.50 J/THPower draw5,510 WBreak-even power$0.157/kWhNet/day at 5.20c$13.84View on OneMiners

Sealminer A4 Ultra Hyd 886T$9,999Hashrate886 TH/sEfficiency9.45 J/THPower draw8,372 WBreak-even power$0.157/kWhNet/day at 5.20c$21.20View on OneMiners

Antminer S21 XP+ Hyd 500T$9,184Hashrate500 TH/sEfficiency11.05 J/THPower draw5,523 WBreak-even power$0.135/kWhNet/day at 5.20c$10.97View on OneMiners

Net per day at 5.2 cents per kWh, today's hashprice, before pool fees. Live prices on oneminers.com.

Frequently asked questions

Michal Beno

CEO of OneMiners, the global Bitcoin mining hosting and hardware platform with 17 published hosting locations, 7-year fixed electricity contracts and a 7-year hardware warranty. He writes about the economics of industrial Bitcoin mining.

Informational only, not financial advice. Figures are a snapshot from public market data, news reports and the OneMiners catalogue as of 27 October 2026 and can change quickly. Net-per-day figures are at today's numbers, before pool fees, and are not a forecast. Crypto prices can fall as well as rise. No return is offered or implied. Do your own research.