If you don't follow adequate risk management principles, buying options is by far the riskiest kind of trading. When you buy an option contract, you put your entire investment at risk. Depending on the moneyness, time value (theta), or any of the other elements that determine option prices, the option premium can quickly lose the majority of its value.

When purchasing options, you should never risk more than 2% of your trading money at any given time. If you're taking positions that are larger than this, you should set a stop-loss and stick to it.

You can use GTT to place a long-term stop-loss order for your option holdings exactly as you're buying them.
GTT stop-loss when buying options

For your order, you can choose any percentage as a stop-loss. If you set a 10% stop-loss and your option buy price is Rs. 80, the stop-loss would be triggered whenever the option price reaches Rs. 72. Because this is a limit stop-loss order, a sell order will be issued at Rs. 72. When using the order window to place a GTT stop-loss, the trigger and limit prices are the same.
Be careful to cancel the pending GTT stop-loss order if you exit this trade on your own (GTT Stop-loss not triggered).
Note: By default, all GTT stop-loss orders are limit orders. In the example above, if the GTT is triggered at 72, a selling Nifty 16000 CE order will be placed at 72. This may not be completed if the market changes quickly. If a stop-loss GTT order is triggered but not executed, you must place it again for the next trading day.