I appreciate your enthusiasm but please take a time and explain me what you want to say here?
USD or any other Forex currency's price against INR fluctuates due to these two factors:
(i) Market movements i.e. appreciation and depreciation in value
(ii) Government (money authority) Intervention i.e. revaluation and devaluation
Since India follows floating rate regime, (ii) is not used largely (almost negligible to control extreme market movements). So in India if price of any forex currency changes it is due to (i) i.e. market movements.
Now let's say government approves btc v inr trading. It will lead to the creation of btc market in India. This mean price of BTC could directly be measured in INR and vice-versa. The market between two currencies can never effect the value of third currency so creation of btc-inr market will have zero impact on USD price in INR.