Buying Nifty December 2021 options

Is it a good way to SELL and keep one lot of Nifty Dec expiry (2021) CE and PE (eg…15000), will there be enough liquidity if I want to exit after getting 5% profit. While looking at the LTT and LTQ there seems to be an update every 30sec, so i belive there is some. Just thought of putting it out here to get expert opinion. Also, is there any pitfall other than being naked.
(Note:I’m actually trying to create a 15K straddle right now for the month of December. )

Thanks in advance!