The idea
A (and other ledger entries) has value when people agree to accept it in trade; a is the shared record of who holds what; (limited supply rules) affects how much each unit can buy.
Group 1 · The basics
what makes a thing worth something

The idea
A (and other ledger entries) has value when people agree to accept it in trade; a is the shared record of who holds what; (limited supply rules) affects how much each unit can buy.
Why it matters
Before you trust a “coin,” ask what agreement and what supply rules sit behind the number on the screen. A logo is not value.
How it works
Value starts with agreement. A baker takes a coin for bread because she trusts the next person will take it from her too. With crypto, that agreement is backed by a shared record: the ledger lists who holds how many units, and many computers keep matching copies so nobody can quietly add a line in their own favor.
Supply rules come next. Each network publishes how new units appear, if they appear at all. Fewer new units chasing the same demand tends to support what each unit can buy; a flood of new units tends to weaken it.
Real example: on the XRP Ledger, all XRP was created when the ledger started, and the rules allow no new XRP to be minted. Small amounts are even destroyed as fees over time. That is a published supply rule anyone can read and check, which is very different from a price on a screen. A rule tells you how supply behaves; it never promises what the price will be. Source: Tokens — Differences from XRP.
Picture it
Town notebook everyone can copy = public ledger. Agreement to take a note for bread = market value.
Watch out
“Backed by vibes” projects: pretty marketing, no clear supply rules, no clear use — treat the screen number as untrusted until you can explain the agreement.