PayPal is not a cryptocurrency. PayPal is just an online wallet for USD or any other fiat currency. You can use it to pay for stuff from ecommerce sites like eBay. You can also send and receive money from person to person. The fees are what is driving people away. Bitcoin has much lower fees and is its own currency.
Thanks my friend, your answer is very good.
Essentially paypal is not a currency, but the place of exchange or buying and selling other currencies there.