Beginner path / Step 018 min read • Reviewed 30 July 2026
What Bitcoin and crypto are
Before choosing an exchange, wallet, or asset, learn the basic pieces: the network, its ledger, transactions, keys, and the market that gives an asset its changing price.
A blockchain is a shared transaction history
A blockchain is a system for ordering and validating records across multiple computers. Participants follow protocol rules to decide which transactions are valid and which history is accepted.
The details vary by network. Consensus design, validators or miners, transaction capacity, fees, governance, smart-contract support, and failure modes are not the same across every blockchain.
Bitcoin is a network and an asset
Bitcoin is the open-source network; bitcoin, commonly written BTC, is its native asset. Transactions spend previously received outputs and are broadcast for validation and inclusion in the blockchain.
Bitcoin has protocol-defined issuance rules and no company that can simply reset a forgotten wallet password or reverse a confirmed transaction. Services built around Bitcoin can still be centralized.
Crypto is a category, not one product
Assets used by their own blockchain, such as BTC on Bitcoin.
Assets created through smart contracts or protocols on another network.
Tokens designed to track another value, with issuer, reserve, contract, and network risks.
Digital assets with different rights, liquidity, utility, and tax considerations.
Ownership means control of authorization
A wallet uses keys to authorize transactions. When an exchange holds the keys, your access comes through the exchange account. In self-custody, you control the keys or recovery method and carry the responsibility for backup and safe signing.
Price is what the market agrees now
A quoted price comes from buyers and sellers on a particular venue. Supply narratives, utility, liquidity, leverage, sentiment, news, and market structure can move it sharply. A low unit price does not make an asset “cheap”; supply and market value also matter.
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