bio technology is good or bad for engineering is we get any placements after pursuing 4 years
Biotechnology engineering is a research field at least you have to invest approx 9 years upto PHD level than you can get good project and salary wise.
Otherwise after B.tech you have to compromise with the salary and job profile like quality control, Business development and marketing .
Choose the field According to all factors your years of investment, job factor , opportunities and demand.
All the best
If you're really interested in biotechnology, then it's fine go and opt that. If and only if, it's your passion. Think about it and otherwise, you can get CSE, ECE etc..
Either u go like CSE , civil, software, mechanical,ece