Every Payment processors have its own drawback and advantages suppose we use bitcoins for being totally anonymous but the main drawback of this payment processor is that it is totally irreversible so once you sent money to someone you cant revert that back .
But on the other hand paypal comes handy in case you were scammed by someone , Paypal protects you from frauds or stolen transaction too. Paypal is worst for you if you received money and someone did charge back because paypal always listens buyer not the seller.