Hello,
I hope you are doing well, Yes you can take admission in BTech after completing BCA but it would not be worth pursuing after BCA because after BCA what you should do is MCA or MBA. As BTech is also Under Graduate Degree and once you complete BCA which is also the undergraduate degree It would be like wasting your 3 years in BCA. What you should do now is that you should prepare for NIMCET so that you can appear for MCA Entrance exam. Through this you will get admission in NIT's. If you want to pursue higher studies then rather looking for BTech you should prepare for MCA which will be Masters Degree. Although MCA is equivalent to BTech but still you will be having 2 degrees- one of Under Graduate and One of Post Graduate.
I hope you find this information helpful. I wish you all the best for your future.
Good Luck
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