Hello @Anonymous and welcome to the community,
I think that the question itself is possibly not fully formed. 3ds Max is just a tool, a means to an end. Some studios may not use Max, but Max knowledge makes it easier to move to other applications if needed. For example I've done quite a few jobs in Maya as well. I think the real question is what kinds of jobs exist for 3D, to which the answer is 'many many jobs'. If you lived in Portland Oregon right now and knew 3ds Max you've basically got your pick of Max studios, it's very easy to get work.
The question may also be "what career options exist for 3d artists." Viz, product design, games, crime reconstruction, virtual tours, medical machinery, manufacturing, construction, VR, etc. all use 3D software and Max is included in all the collections making it the one commonality between the industry collections. The concepts you learn in Max will apply to other software like AutoCAD or Maya in many cases. Clearly I am biased, Max is my favorite software in the world but I think perhaps you should expand the definition of what you are. You are not a Max artist, you are an artist. I prefer to garden with a hoe but if someone hands me a shovel I know what to do with it.
If you limit yourself to a single software as the definition of your career aspirations or artistic depth then you are severely limiting yourself and your options. Some projects require Revit, some Fusion, some Max, some all 3. Then, you learn the most popular tools to increase your versatility. I certainly prefer 3ds Max and will use it every time it's appropriate over anything else, but my toolbox has more than that in it. If you find yourself defining your career by the software you use it's similar to that old adage, "When all you have is a hammer, everything looks like a nail." By all means learn Max, but also learn Maya, AutoCAD, Revit, Fusion, Inventor, etc even if just a little bit so you can understand how the entire 3D software ecosystem is set up. (There are also some great non-Autodesk software titles out there.) Each bit of knowledge you gain increases your overall viability and versatility to various businesses.
I would start looking at the pluses and minuses of each industry. Where you work will also have an impact. If you live in a big city you have more options then in a small town. Ask yourself what you want out of life and then find the career that suits it. Most of all, make sure you enjoy the work. Don't go working in games for example if you don't enjoy games work, that will suck the fun out of them with the quickness if you're a gamer. Do you want to be a freelancer and live life closer to the edge? Or, do you want a more stable but mundane day in and day out experience? I didn't know to think about these things when I entered the field but I suggest that you think about what your end goal is. Please let me know if you have any questions.
Best Regards,