30/12/2021
When you hear about bitcoin "mining," you envisage coins being dug out of the ground. But bitcoin isn't physical, so why do we call itmining?
Because it's similar to gold mining in that the bitcoins exist in the protocol's design (just as the gold exists underground), but they haven't been brought out into the light yet (just as the gold hasn't yet been dug up). The bitcoin protocol stipulates that 21 million bitcoins will exist at some point. What "miners" do is bring them out into the light, a few at a time.
They get to do this as a reward for creating blocks of validated transactions and including them in the blockchain.