BTC is secure, FAST and more reliable.
Paypal has high fees and chargebacks.
To be honest, I'd rather say Paypal is faster than the Bitcoin. Because sometimes you will had to wait more than a few hours for your transactions to be confirmed by the network.
But I still prefer Bitcoin over Paypal because of certain features that Bitcoin has.
well with paypal you have to wait much more if you want to move your funds to a credit/debit card for example
and to another paypal account i don't remember they are instant anyway