First bitcoin13 Jan 2023 08:41
All bitcoin need mining even the first one.
3 January 2009, the bitcoin network was created when Nakamoto mined the starting block of the chain, known as the genesis block. Embedded in the coinbase of this block was the text "The Times 03/Jan/2009 Chancellor on brink of second bailout for banks".
The mining process has remained essentially the same since the beginning. The difficulty has increased due increased mining activity.
As it gets more difficult faster machines and more energy is needed to win. Obviously some miners will fall by the wayside due to their strategy in remaining profitable or weathering crypto winters
It is some peoples opinion that winters will get less "cold" over time.
If regulation is introduced this may play a part in severity of winters