I think it's about hacking into someone else's computer, using the CPU of someone else's computer to dig.
It is true that more and more people are using invasive methods to reduce the cost of mining, because such profits are very high.
The profit is very high but I do not think this will be a long-term job and that is the job that is considered illegal.
Economic crimes will have to pay for that. I'm not interested in business models like this, I do not like to cause trouble to others. To have a good business environment, you need to be an upright person and the good fortune will come to you. Make money by yourself and eliminate phishing.