Learn → BASICS 01 / BASICS · 3 min

What is Bitcoin?

A network with no central bank, with a fixed cap of 21 million.

Bitcoin is a digital network that lets people send value directly to one another, with no bank or other institution in between.

A network with no middleman

When you transfer lei through a bank, the bank is what updates the balances in its own internal system. In Bitcoin, that role is played by thousands of independent computers spread around the world, which verify every transaction and record it on a blockchain, a public ledger anyone can read but no one controls alone. There’s no head office, no director, and no central server that someone could shut down or block.

A supply capped at 21 million

The network’s code fixes a ceiling: there will only ever be 21 million bitcoin, at most. No one can issue more, no matter how much they might want to. The limit is known in advance by everyone who uses the network, and it can’t be changed without the near-unanimous agreement of its participants, so in practice it doesn’t change. A single bitcoin can be split into much smaller units, down to a hundred-millionth, so you don’t need to buy a whole one to use it.

Who “issues” it?

Bitcoin has no issuer, in the sense that the leu has a central bank. New units appear as a reward for the computers (“miners”) that contribute computing power to verify transactions. The reward decreases periodically, following a rule fixed since launch, and at some point in the distant future it will reach zero. From then on, the network will sustain itself only from the fees paid by whoever sends transactions.

Where the value comes from

A bitcoin’s value forms exactly the way the value of any freely traded asset does: from the meeting point between those who want to buy and those who want to sell. There’s no “correct value” set anywhere, which is why the price can be highly volatile, sometimes moving significantly within a single day. What fuels demand is the limited supply, a growing number of users, and the fact that it’s accepted as a means of exchange or a store of value by a growing number of people and institutions. Nothing in this guide is a prediction of where the price is headed: no one can know that in advance.

What Bitcoin isn’t

Bitcoin isn’t a company, and you can’t buy “shares” in it. It has no board of directors, doesn’t publish financial reports, and doesn’t pay you dividends. Holding bitcoin gives you no legal claim over any firm or physical asset: you only have control over a unit of a digital network, through its associated private key. It isn’t guaranteed by any state and isn’t the digital equivalent of a national currency.

What to remember

  • Bitcoin runs without a central institution: the network is maintained by thousands of independent computers.
  • Supply is capped at 21 million units: a fixed rule in the code, not a marketing promise.
  • It isn’t a company or a stock: no dividends or legal rights over a firm, just control over a private key.
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