You dont need to exercise them, you can just sell them before expiration. If they expire worthless, you just lose your initial, thats it... If you sell them SHORT, then you might get executed by the buyer, but not if you buy straight up calls/puts... I buy options all the time and have never converted to shares.
You can lose easy with options but the gains can be massive if you catch a nice uptrend.
playing puts is a much safer way to play a possible down trend in the markets than selling short... and a downtrend is coming IMO