Market capitalization

Anna opens a market overview. Next to Bitcoin’s price she sees a much larger number: Market Cap. Suppose the unit price is 100 000 USD per BTC and the counted supply is 20 000 000 BTC. Multiplication gives 2 000 000 000 000 USD, or two trillion dollars. These are illustrative inputs, not the current price or exact supply today. The calculation values every counted bitcoin at the same price, whether it is for sale or has sat in a wallet for years. This makes capitalization useful for comparing size even when only a small part of the supply changes hands each day. [11]

Suppose the reference price rises from 100 000 to 101 000 USD while the counted supply stays unchanged. Our model’s capitalization increases by 20 000 000 000 USD: twenty billion dollars. That does not mean buyers just contributed twenty billion dollars. The formula has repriced the entire counted supply. Likewise, a fall does not mean someone withdrew that amount. Nor does every small trade move a benchmark: its effect depends on how the provider calculates the reference price. Market capitalization is not a shared bank account belonging to holders. [11] [3]

Anna can estimate her holding’s value using the displayed price, but selling requires a buyer. A large order may exhaust buyers at the best available price, so the next portion sells for less. This difference from the expected execution price is called Slippage. Liquidity describes how easily an asset can be traded without substantially moving its price; the Spread is the gap between the best buying and selling quotes. Two assets with the same capitalization can have very different liquidity. Multiplying the full supply by one price does not mean the entire supply could be sold at that price. [13] [14] [15]

Bitcoin has no single exchange or worldwide closing price. A market overview may use one exchange’s latest trade, an average across markets or a benchmark: a reference price calculated using predefined rules. CME CF Reference Rates, for example, process trades from selected exchanges in time intervals and limit the effect of unusual prices. When Anna compares two websites, she first checks the currency, time and price source. Different capitalization figures need not indicate a mistake: the sites may measure different moments or use different methods. [3] [12]

The number of units also has several meanings. Circulating supply is a provider’s estimate of supply in circulation; total supply generally counts created units after subtracting destroyed ones; max supply is the upper limit. Other assets may have units locked up for later release. FDV, fully diluted valuation, usually multiplies today’s price by maximum supply. Using a rounded limit of 21 000 000 BTC and our example price gives 2 100 000 000 000 USD. This is not a forecast: the future price is unknown, and providers may use different FDV methodologies. [2] [11]

New bitcoins follow issuance rules, and future Block Subsidy—the newly created portion of a block reward—is not part of today’s supply. A Full Node is software that independently checks whether transactions and blocks follow Bitcoin’s rules. It maintains the UTXO set: records of amounts from earlier transactions that have not yet been spent and can be used later if their spending conditions are met. In Bitcoin Core, gettxoutsetinfo returns the sum of their amounts in total_amount. This is a verifiable figure for a particular block. It does not establish that someone still has every required key or that every output can be spent immediately. Provably unspendable outputs may be excluded from the set. Its total therefore cannot replace an arbitrary circulating-supply measure without explaining the differences. [9] [16] [17]

A balance has not moved for years. Its owner might be saving, might have died or might have lost the Private Key, the secret key a wallet uses to sign transactions. Age alone cannot tell us which. Standard capitalization can therefore count bitcoins that nobody can access anymore. Free float tries to estimate the supply available to the market; the provider decides which long-term or otherwise restricted holdings to exclude. This is a model with assumptions, not a verified list of lost coins. Long inactivity does not prove loss. [10] [17]

A company’s market capitalization multiplies its share price by outstanding shares. It values shareholders’ equity, not simply the cash in the company’s bank account; assessing the whole business also requires considering debt and other liabilities. For gold, a price can be applied to the estimated above-ground stock. That stock includes jewellery and central-bank holdings, not all currently for sale. A ranking of Bitcoin, companies and gold gives a sense of scale. It does not mean a bitcoin carries the same ownership rights as a share or that all these assets have the same risks. [1] [7]

Bitcoin dominance is Bitcoin’s capitalization as a share of the combined capitalization of a selected group of cryptoassets. If Bitcoin accounts for two trillion dollars and the included market, including Bitcoin, totals four trillion, its share is 50%. The result depends on which assets the provider includes and how they are valued. Stablecoins, tokens seeking to maintain a value such as one dollar, and tokens representing another already-counted asset also affect the calculation. Dominance can rise simply because other assets fall faster. That alone does not establish that money moved from them into Bitcoin. [10] [11]

Realized Cap takes a different approach: each UTXO is valued at the price when it last moved, technically when the output was created. For this calculation, Coin Metrics uses the USD closing price on the day the output was created. Old bitcoins need not be valued at today’s price. Yet this is not a ledger of actual purchases either. Moving funds between one’s own wallets can create a new output without a sale. The same applies to change returned to the sender: a transaction spends an earlier output in full, pays the recipient’s portion and may return the remainder after the fee to a new output controlled by the sender. We therefore do not know every holder’s exact acquisition cost. Anna gets more from a market overview by considering price, counted supply, methodology and liquidity together. A large number helps her understand market size; it cannot make a buying decision for her. [10] [17]