The best approximation of the maximum amount of coins that will ever exist in the lifetime of the cryptocurrency. *see Circulating Supply and Total Supply.
Once the maximum supply is exhausted, no new coins or tokens will be produced or mined.
Most cryptocurrencies come with a maximum supply.
Usually, the maximum supply is determined by the limits outlined by each underlying protocol of every digital asset.
In the case of Bitcoin, the maximum supply is fixed at 21 million coins.
Not all cryptocurrencies have a predetermined fixed supply, and one of them is Ether.
Maximum supply is a different concept from total supply. Maximum supply is calculated by adding the total amount of coins that have been mined with those that have yet to be mined.
In contrast total supply is calculated by subtracting the number of coins that have been lost from the amount that have been mined.