The circulating supply of cryptocurrencies refers to the number of coins or tokens of a particular cryptocurrency that are currently in circulation and available for trading. It does not include coins or tokens that are locked up or held by the project team, investors, or other stakeholders.

The circulating supply of a cryptocurrency can have a significant impact on its market value and liquidity. In general, a higher circulating supply can lead to a lower price per coin or token, all else being equal, as the market capitalization of the cryptocurrency is spread over a larger number of units.

Here are some examples of the circulating supply of popular cryptocurrencies as of March 2023:

• Bitcoin (BTC): Circulating supply of around 18.3 million BTC
• Ethereum (ETH): Circulating supply of around 122 million ETH
• Binance Coin (BNB): Circulating supply of around 157.8 million BNB
• Cardano (ADA): Circulating supply of around 34.7 billion ADA
• Solana (SOL): Circulating supply of around 383.6 million SOL
• Dogecoin (DOGE): Circulating supply of around 132.6 billion DOGE

It's important to note that the circulating supply of cryptocurrencies can change over time due to factors such as mining rewards, token burns, or other token supply adjustments.

The circulating supply of cryptocurrencies varies depending on the specific cryptocurrency in question. Each cryptocurrency has its own unique set of rules and parameters that determine how new coins are created and how they are distributed.

For example, Bitcoin has a maximum supply of 21 million coins, of which around 18.8 million have already been mined and are in circulation. Ethereum, on the other hand, has no fixed maximum supply and instead has an annual inflation rate of around 4-5%.

To find out the current circulating supply of a specific cryptocurrency, you can visit its official website or consult a reputable cryptocurrency data provider such as CoinMarketCap or CoinGecko. These websites track the supply and demand of various cryptocurrencies and provide up-to-date information on their circulating supply, market capitalization, and other key metrics.