When the final fraction of the 21 millionth Bitcoin is successfully mined—projected to occur around the year 2140—no new bitcoins will ever be created or added to the circulating supply through block rewards. Once this hard cap is reached, miners securing the network will rely entirely on transaction fees paid by users to incentivize their computational power and maintenance operations. Economists suggest that transitioning to a completely fixed supply model could enhance Bitcoin's status as a definitive scarce digital store of value, though long-term fee market dynamics will dictate network security incentives.