Mining Income is the reward earned by miners for generating new blocks through mining.
In Bitcoin, a certain number of Bitcoins are awarded for finding a block.
Mining rewards started at 50 BTC per block. The speed of excavation is one block per 10 minutes.
It is halved every 210,000 blocks, with the 6,929,999th block being the last mining reward. The reward will be halved approximately every four years.
It will take about 132 years to excavate the 6,929,999 blocks, and the last block will be excavated around 2140.
The total number of bitcoins to be issued is about 21 million BTC, which is the upper limit for bitcoin issuance.