Yes, you certainly can. Personally you should choose between time given and Progress made. If you have enough time to spare you can pursue the MBA route.

However redundant knowledge that may or may not help with your pursuit is ill advised.

Try for a short term course online or even in your city. From my personal knowledge I know IIM Skills is a great option. A friend of mine did his investment banking a while back and he's well placed through them. hope this helps! Cheers!

yes you can 

Based on your financial situation and your interest in Financial and Management field you can choose from following options:

1. If you can crack the entrance exams of premier institute and be eligible for scholarship program then go with MBA program in premier institute

2. If you have sufficient funds to back you up for regular MBA program (without personal financial pressure to earn a living within 3 years)  then go with regular program MBA finance option in B-schools topped up with certification programs in investment.

3. If you have financial constraint then take up a regular job then do executive MBA offered by both premier institute and B schools . Top this up with certification program in investment, stock market etc

4. PG Diploma from Symbiosis institute + CFA program

Please note: End of the day, the passion that you develop and exhibit in Finance is what will make you a good investment banker.

Hope this was helpful.

Adarsh,

           To be an Investment Banker, minimum graduation is necessary. So after completion of your B. Tech, you can try to become an Investment Banker. But It'll be always helpful if you complete MBA because that will be going to help you with this job. Otherwise, law degrees can be useful too.

Regards