01—03 A five-minute field guide
No central bank. No special access. No hidden supply. Three properties make the network fundamentally different from money that came before it.
Explore the threeTHE CORE Three properties
Predictable supply
Bitcoin’s issuance is written into its protocol. New coins arrive on a known schedule, the rate halves roughly every four years, and the total supply can never exceed 21 million.
Permissionless network
Thousands of independent computers enforce the same rules. Anyone can join, verify the ledger, send value, or leave—without asking a bank, company, or government.
Verifiable history
Transactions are grouped into blocks and protected by proof-of-work. Altering old data would require redoing enormous computation and overtaking the honest network.
THE POINT The whole is greater
Scarcity is meaningful because no central party controls the ledger. Decentralization holds because the history is expensive to attack. Security endures because participants are rewarded with a scarce asset.
ONE SENTENCE
Bitcoin is a scarce digital asset, secured by an open network that no one controls.