Hey all, I'm a final year MEng student in engineering physics (a very broad degree) at a recognized Scandinavian technical university. I'm deciding what to do with my life, and my personal dream is to get into business in the long term, preferably in something high-tech that's growing (hopefully even do a startup). In connection to this I'm thinking about doing a (3-4 year) PhD at a very famous European university, and deciding on which field: Biophysics, photonics, computational science or bioengineering. Right now I'm leaning towards PhD in bioengineering. In the past decades biology has become very well integrated with computational methods, principles of engineering, rigorous physics, and this has bred new and exciting subfields like neural engineering, artificial organs, genetical engineering, biomonitoring devices (and phone apps) and so on. It's a field on the rise IMO, and if there's one thing any person would pay allot of money for, it's their own and their loved ones' healths. So you got a huge market, scattered competition and up-and-coming disruptive technologies. In addition, a PhD program in engineering will teach you allot of soft skills that a PhD in physics wont. What do you guys think? Which field has the largest potential for the future? Do I have ground-contact or am I being delusional?