Feels like mazohism for leaning towards the PhD. More stressful, 200euros less and unregulated working hours.

There is nothing wrong with my job, despite the fact that it has no career growth. I mean that I will be a software engineer for ever in this job- no future development. Also, my main task is implementing features on innovative software but I am not on the innovation part. Despite all of that, I could easily settle up with the job as the salary is good, the working hours are perfect and there is no pressure. I don't hate my job but I also don't like it and I am definitely not passionate for it. But, who is? Anyway, my main concern is that the PhD grant is really great and the salary will be similar to the one i am getting now. So, I think to myself, why not doing a PhD in a very promising field (Big Data in Computational Biology and Genetics) while at the same time getting good money and result with the Dr. title? This is something that eats me: the money, the prestige and the post-PhD career which seems more interesting at least in my mind. What do you think ?

Dear all,
I would like your opinion and advice on the following situation: I have graduated from my Master's Degree at June and since then I have been working at a very good company as a SW engineer. However, a professor from the same University told me if I want to do a PhD with him. My Master was in Biomedical engineering and currently (although I am working in a Medical company) I am doing mostly software development stuff. The PhD topic is in Bioinformatics and Genetics and the professor is a top one(60.000 citations, h-index=100). The funding is very good and is almost equal to my salary(200 euro difference). Do you think it's a stupid idea to leave my work to pursue the PhD or should i stay in the safety that my job provides? I work 9-5, good salary, no pressure at work or workload at home. My main fear is that after the PhD it will be very difficult to find a job and also I am really afraid of putting my self into great trouble on engaging with the PhD.
What do you think?