Which one has more better job prospects and pay , Biotechnology or Microbiology in the near future

Both of these involve work night and day for relatively low pay considering work and education. You need to do it for fun more than money, for the most part.

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You have good possibilities to have a good job, that depends were u want to work. but if u really want to focus in research for infections diseases u should take microbiology because a lot of pharmaceutical countries start to focus in the research & development of developing countries & they r making investment in the research of new methods of examination & how to get faster test in this countries so the microbiology have several options specially if u want to focus in research.