Blockchain
Blockchain: A blockchain is a shared digital record of transactions that is copied across thousands of independent computers. New transactions are grouped into blocks, and each block is cryptographically linked to the one before it, so past records cannot be quietly changed. This lets people transfer value without relying on a bank or central operator.
How a blockchain works
Computers on the network, called nodes, each keep a full copy of the record. When someone sends a transaction, nodes check it against the rules. Validators then bundle valid transactions into a block and add it to the chain using a consensus method such as proof of work (Bitcoin) or proof of stake (Ethereum).
Blockchain vs cryptocurrency
The blockchain is the network and its record. A cryptocurrency is the native asset used on that network, for example BTC on Bitcoin or ETH on Ethereum, which pays transaction fees and rewards the people securing it. Many other tokens can also live on a single blockchain.
Why the design matters to investors
- Transparency: anyone can inspect transactions, which is what makes on-chain analysis possible.
- Security: rewriting history would require controlling a large share of the network.
- Trade-offs: networks balance speed, cost and decentralisation differently, which shapes how they are used.
How Collective Shift uses blockchain data
Because every transaction is public, our research team reads blockchain data directly, such as holder behaviour and supply held at a loss, rather than relying only on price charts. That is the foundation of the on-chain metrics we teach members.
Frequently asked questions
Is blockchain the same as Bitcoin?
No. Bitcoin was the first blockchain and its native coin. Today there are many blockchains, such as Ethereum and Solana, each with its own design.
Can a blockchain be hacked?
Large established blockchains have proven very hard to attack directly. Most losses come from exchanges, apps or stolen keys rather than the underlying chain.
Who controls a blockchain?
Public blockchains are run by independent node operators and validators around the world, following open-source rules that no single party can change alone.