Those numbers seem way too high. Considering that only 411 people bought from buysellbitco.in, the number of people seen on this forum, the fact that mining became out of reach of most people here before awareness, and that it was very tough to buy after that due to lack of exchanges, it seems way too farfetched. RBI's statement had no effect on bitcoin prices. i.e very few were trading on exchanges abroad.

This seems rather vague and uninformative, and people would be right to be very very careful. I would however give you the benefit of doubt for now, till you provide more information. Since the features you claimed such as ssl etc seems to be still missing from your beta site, I am not sure what all measures security experts tested.

Plain hashing is highly insecure for passwords. sha1 is not encryption. The passwords are just begging to be stolen. You have to spend a lot of time learning about security best practices, and you should pause release until then. Please use bcrypt, pbkdf2 or scrypt.