What are some good field to study in biology for future opportunities...

Top tier fields in near future in biology: epigenetics, drug metabolism.

UCSD is always a safe bet for anything related to advanced biology

Agreed with these. Over the past half-decade, synthetic biology and systems biology have exploded.

In structural biology, cryo-EM is hot.

So, if you're interested in academia, I would say either synthetic biology, systems biology/complex systems, or structure with a background in cryo-EM are your best bets. (But, also, be cognizant of the fact 1 in 12 life sciences PhDs will end up in tenure-track faculty positions.)

What are some fields with good industry prospects? What about microbio? I heard lots of governments need microbiologists.