There is no safe way unless you are going to limit the loss with spreads. To be blunt, you got greedy. There is a reason someone is buying those puts and those that bought them just earned enough to cover their insurance till the next time this comes around - especially with vols at such historic levels. If selling a put, think what is the worst case - war, natural disaster, company fraud, etc. and decide if you can take a loss if the markets move drastically. You also need to keep in mind you don't need the markets to move through your strikes as a significant spike in volatility can do just as much damage. The markets are hot but these are crazy times - I'm not sure when the next spoke in vol will come or what will provoke the markets but I would make sure you are willing and able to accept a significant loss and forced cover when shorting.