I had tried mining Bitcoin but I used a second hand Antminer S19, but the headache is that my power bill went up to the roof. It doubled the amount I was paying initially. So, I switched to Monero (XMR) on my old gaming PC's CPU to see if the cost will reduce and make more money in the process but I was able to earn just $10/month. This is not life-changing, but at least it covers my Netflix subscription . 😂
For GPU folks, I discovered that Ravencoin (RVN) pays approximately $1.50/day with my RTX 3060. So, tell me what's working for you?