The Bitcoin halving is a programmatic, automatic reduction of the block reward paid to Bitcoin miners — occurring every 210,000 blocks (~4 years). At genesis (2009): 50 BTC per block. 2012: 25 BTC. 2016: 12.5 BTC. 2020: 6.25 BTC. 2024 (April 19): 3.125 BTC. 2028 (projected): 1.5625 BTC. Supply mecha