Guides
What is Bitcoin?
The network, the asset, the fixed supply, and what "decentralised" actually means.
What is a blockchain?
Blocks, confirmations, and why a recorded transaction cannot be edited or reversed.
How Bitcoin transactions work
Inputs, outputs, change, the mempool, confirmations, and what "pending" really means.
Blockchain transaction fees
Who sets fees, why they rise and fall, and why a paid fee cannot be refunded.
What is a crypto wallet?
Private keys, addresses, custodial vs non-custodial, and protecting your seed phrase.
What is a crypto exchange?
Centralised exchanges that hold your funds vs decentralised ones that do not.
What is a crypto swap?
Exchanging one cryptocurrency for another in one step, plus fees and slippage.
What is a cross-chain bridge?
How assets move between separate blockchains, the main designs, and the risks.
How cross-chain bridges work
A step-by-step walkthrough: deposit, confirm, verify, release or mint.
Bridge vs swap
A swap changes what you hold; a bridge changes which chain it lives on.
What is DeFi?
Financial services run by smart contracts instead of banks — and the missing safety nets.
What is a DEX?
Trading tokens from your own wallet against liquidity pools, with no account.
How these guides are made
Every guide is written to answer one real question. We state the answer in the first two sentences, explain the mechanism, list the key facts and the risks, and link to primary sources (protocol documentation, standards, and established references). We do not give price predictions, investment recommendations, or “how to earn” schemes. See our editorial policy and methodology.
Not financial advice
Everything in the learning hub is general information about how the technology works. It is not financial, investment, legal or tax advice, and it does not take your personal circumstances into account. Cryptocurrency carries risk, including the permanent loss of funds.