What is crypto mining? How Bitcoin mining works, plainly explained
Crypto mining is the process in which computers bundle transactions into blocks and compete to solve a proof-of-work puzzle; the winner adds the block to the blockchain and receives new coins plus the transaction fees. Mining is what keeps networks like Bitcoin, Litecoin and Dogecoin running without a bank in the middle. This guide explains how it works, what it costs, why cloud mining and phone mining apps are mostly traps, and how mining differs from staking.
What is crypto mining?
Crypto mining is the work of collecting pending transactions, packing them into a block and racing other miners to find a valid solution for that block. The first miner to find one broadcasts the block, the network checks it, and the miner receives the block reward and the fees paid by the transactions inside.
The block reward is how new coins enter circulation on proof-of-work networks. That is why it is called mining: like digging gold, it takes real effort and resources to produce something scarce.
A miner is simply the computer, or the person running it, that does this work. Anyone can join, but competing seriously takes specialised equipment and cheap power.
How does Bitcoin mining work?
Bitcoin mining works by guessing. The puzzle has no shortcut: a miner changes a small number in the block and runs it through a hash function again and again until the result falls below a target set by the network.
This work is also what keeps the network secure: every block builds on the previous one, so changing an old transaction would mean redoing that block and every block after it faster than the rest of the network combined. The network adjusts the difficulty automatically so blocks keep arriving at a steady pace as machines join or leave.
- Collect: the miner picks waiting transactions, usually preferring those that pay higher fees.
- Build: it assembles them into a candidate block that points to the previous block.
- Guess: it hashes the block over and over with different numbers until one result meets the target.
- Broadcast: the winning block is sent to the network, and other nodes verify it in moments.
- Repeat: everyone moves on to the next block, and each new block adds one more confirmation to the ones before it.
Mining hardware: from CPU to GPU to ASIC
Mining hardware has gone through three main stages. In the early days of Bitcoin, an ordinary computer processor (CPU) was enough. Then miners moved to graphics cards (GPUs), which can run many simple calculations in parallel.
Today Bitcoin is mined almost entirely with ASICs, chips built to do one hashing algorithm and nothing else. Litecoin and Dogecoin use a different algorithm than Bitcoin, but they too are now dominated by dedicated machines.
An ASIC made for one algorithm cannot mine coins that use another, and older models fall behind as newer, more efficient ones arrive. That is why a home computer or a phone has no realistic chance against professional mining farms.
Is crypto mining profitable? The real costs
Whether mining is profitable depends on three things you do not control: the price of electricity, the network difficulty and the price of the coin. If any of them moves against you, the same machine can switch from earning to losing.
Beyond the machine itself, mining has costs that beginners often underestimate:
- Electricity: the machines run day and night, so power is usually the largest ongoing cost.
- Cooling: miners produce a lot of heat and need ventilation or air conditioning.
- Noise: ASIC fans are loud enough that most homes are not a practical place for them.
- Wear and obsolescence: hardware ages, breaks and loses value as more efficient models appear.
- Pool fees and maintenance: most miners share rewards through a pool, which takes a cut.
How does the halving affect miners?
The halving cuts Bitcoin’s block reward in half every 210,000 blocks, which is roughly every four years. The most recent halving happened in April 2024 at block 840,000.
After each halving, miners earn half as many new coins for the same work, so transaction fees become a larger share of their income over time. Less efficient miners may switch off when their costs exceed what they earn, and the difficulty then adjusts. What the halving does to the price is uncertain, and nobody can forecast it.
Proof of work vs proof of stake: what is the difference?
Proof of work and proof of stake are two ways to decide who adds the next block. In proof of work, miners spend computing power and electricity; in proof of stake, validators lock up coins as collateral and can lose part of them if they cheat.
Ethereum used mining until September 2022, when it switched to proof of stake in an upgrade known as The Merge. TON also runs on proof of stake, so it cannot be mined; holders take part through staking instead.
| Aspect | Proof of work | Proof of stake |
|---|---|---|
| How blocks are made | Miners race to solve a hashing puzzle | Validators are chosen based on the coins they lock up |
| Energy use | High; security comes from spent electricity | Low; security comes from locked collateral |
| Who takes part | Anyone with mining hardware and power | Validators, or holders staking through a pool |
| Reward for | Mining a valid block | Validating honestly |
| Examples | Bitcoin, Litecoin, Dogecoin | Ethereum (since September 2022), TON |
What is a mining pool, and where do the rewards go?
A mining pool is a group of miners who combine their computing power and share the rewards in proportion to the work each one contributes. A single small miner might wait a very long time to win a block alone; in a pool, payouts are smaller but more regular.
Pools pay out to a wallet address you provide. Waletifi is a wallet, not a mining service: it does not mine and does not sell mining. But you can give a pool your own Bitcoin, Litecoin or Dogecoin receive address from Waletifi, so the coins land in a wallet whose keys stay on your phone rather than in someone else’s account.
Before you set a payout address, check that the pool supports that address type and that you picked the right coin. A Bitcoin payout sent to a Litecoin address, or the other way round, will not arrive.
Is cloud mining legit? And can you mine crypto on a phone?
Most cloud mining offers and phone mining apps are either scams or not profitable. Cloud mining means paying a company to mine on your behalf; many of these sites own no machines at all and pay early users with money from new ones until they disappear.
Phone mining is not realistic either. A phone is far weaker than mining hardware, it overheats and drains its battery, and many apps that call themselves mining just hand out points or tokens while showing you ads. Watch for these warning signs:
- A guaranteed daily or monthly income, whatever happens to the coin’s price.
- Pressure to bring in friends, with bonuses tied to referrals.
- Withdrawals blocked until you deposit more, pay a fee or upgrade your plan.
- Requests for your recovery phrase to connect a wallet or claim rewards.
Is crypto mining legal?
Whether crypto mining is legal depends on where you live, and the rules change. Some countries require a licence, some set special electricity tariffs or rules for miners, and some restrict or ban mining altogether.
Before you buy any equipment, check the law where you live, including power rules and tax. Using subsidised or unauthorised electricity can carry serious penalties even where mining itself is allowed.
