How Does Crypto Work? A 2026 Guide for Australians

Cryptocurrency is digital value recorded on a shared public ledger — usually a blockchain — that many independent computers keep in sync. Your coins are not files inside an app; they are entries on that ledger. A wallet stores the cryptographic keys that prove you control an address and lets you sign transactions. When you send crypto, your wallet builds and signs an instruction, the network checks the signature and that the funds are unspent, and miners or validators add it to a new block, with later blocks stacking on as confirmations until reversing the transfer becomes impractical. Networks agree on the next block using different rules: proof of work (Bitcoin mining) or proof of stake (Ethereum validators). Fees pay the operators who secure the network, and different chains are separate ledgers with different trade-offs, which is why sending an asset over the wrong network is a common irreversible mistake. This guide also covers public addresses versus private keys and seed phrases, what a wallet actually does, the difference between self-custody and an exchange account, Bitcoin, altcoins and stablecoins, and the Australian angle: AUSTRAC virtual asset service provider registration is an anti-money-laundering requirement rather than an AFSL, the ATO generally treats crypto held directly as a CGT asset, and Scamwatch reports a steady stream of fake support requests for seed phrases. Education only — not financial advice. Publisher: Eagle BTM Pty Ltd ACN 659 281 820 (AUSTRAC DCE / VASP).

How does crypto work? Plain-English guide for Australians — ledgers, keys, wallets, transactions, PoW vs PoS, AUD buying basics and ATO CGT context.