I have read your question and I am somewhat alarmed and saddened by your current state of being. I feel you need to take a broader perspective in this stage of life, zoom out; Do you really mean your only interest is in math? You also studied physics. You say "I don't have any interest in anything from the society"; are you sure?? You could contribute to medicine; how the brain might work. I'm not going to sum things up what you might do, but it vastly more than just finance or data-science. It is your quest now what else apart from pure math, you find interesting and go from there..