Bitcoin Hits 20 Million Coins Mined Milestone

The Bitcoin network has achieved a significant milestone, with the 20 millionth coin mined this week, leaving just one million coins to enter circulation out of its fixed supply cap of 21 million. This event, recorded around block height 940,000 after approximately 17 years of operation since the network's launch in January 2009, underscores the cryptocurrency's programmed scarcity and gradual issuance schedule.

Mining, the process by which participants validate transactions and add them to the blockchain, rewards miners with newly created bitcoins alongside transaction fees. The network began with a block reward of 50 bitcoins per block, but a mechanism known as halving reduces this reward by half roughly every four years, or every 210,000 blocks. The most recent halving, in April 2024, lowered the reward from 6.25 to 3.125 bitcoins per block, slowing daily production to about 450 bitcoins. At this rate, and with future halvings continuing until around 2140, the remaining coins are projected to take more than 114 years to mine fully.

This design ensures a predictable supply expansion, contrasting with fiat currencies that can be issued without limits. As block rewards diminish,...