I also remember then, they spoke about mining of BTC, are people still mining it and what are the requirements to do that, at least to recover my past ignorance?
If you felt you have missed out from owning Bitcoin, you have not because Bitcoin has big future potentials and mining is not the only way in which you can own Bitcoin. You can also be an investor, investing progressively and comfortably in a flexible DCA strategy. To set up a Bitcoin mining rig, it will cost you thousands of dollars to purchase the required machines but investing in Bitcoin could be more flexible but if you have the money to start a rig, I recommend you watch this videos. For a rough estimate, you can spend more than $12k to set up a profitable mining rig.
RTX 3080 Mining Rig Build | 600 MH/s and 1500 WattsGPU Mining RigBitcoin ASIC setup and install guide| Bitmain Antminer S19J pro. If you also like to read, this article is so comprehensive.
Is ASIC Mining Profitable in 2025? Factors, Tips, and Future Trends