What is the max Bitcoin ever?

The maximum total supply of Bitcoin is capped at 21 million coins. This limit is a fundamental aspect of Bitcoin's design, ensuring scarcity and potentially driving up its value over time.

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Despite this theoretical limit, it is unlikely that the exact number of 21 million Bitcoins will ever be issued. This is due to the use of rounding operators within the Bitcoin codebase, which can result in small discrepancies.

The rounding operators are used to handle fractional Bitcoin amounts, known as satoshis, which are one hundred millionth of a Bitcoin. These operators can cause the total number of Bitcoins issued to deviate slightly from the exact figure of 21 million.

Once the Bitcoin supply reaches its upper limit, no additional Bitcoins will be generated. This means that the only way to acquire Bitcoin will be through buying it from existing holders, mining transaction fees, or through other forms of acquisition such as airdrops or forks.