Bitcoin has reached a significant milestone with over 20 million BTC mined, which illustrates its scarcity model clearly. This represents more than 95% of all Bitcoin that will ever exist, leaving less than 1 million coins to be mined over the next century due to the system's halving mechanism. The 20 millionth coin was mined on March 9, a notable event that follows nearly 17 years since the creation of Bitcoin’s genesis block in January 2009.
#How does Bitcoin's scarcity work?
The supply schedule of Bitcoin is uniquely engineered to promote scarcity. Total issuance is capped at 21 million coins and the mining rewards are halved approximately every four years. After the next halving in April 2024, Bitcoin's production will slow to about 450 BTC each day. This means that while it took under two decades to mine 95% of Bitcoin, the remaining 5% will take until around 2140 to extract fully.
#What implications does this have for miners?
Miners currently earn from block rewards and transaction fees. Presently, block rewards are the primary revenue source, but as halving approaches, reliance on transaction fees will increase. This shift poses a risk for miners, as failing transaction fees could render their operations unprofitable. Such a scenario could reduce the overall hash rate, raising concerns regarding Bitcoin's network security.
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#How does supply scarcity influence demand?
With over 95% of Bitcoin already in circulation, the decrease in issuance emphasizes the digital currency’s value proposition. As new coins become scarcer, any increase in demand confronts a limited supply. Unlike gold or oil, where producers can ramp up production without restriction, Bitcoin's fixed supply means that additional hardware does not yield extra coins. The adjustment in mining difficulty helps maintain this balance.
Moreover, a substantial number of mined coins are estimated to be permanently lost, as many remain in wallets for which the keys have been misplaced or destroyed. This significantly lowers the actual circulating supply available for trading compared to the total mined figure.