They aren't comparable.
It's like apples and oranges.
It also depends on what you are using them for.
PayPal sucks, but use it if you need to.
I still use paypal so far, Bitcoin does have a lot of influence to shift online payments, and paypal cannot match this phenomenon, they can only appreciate bitcoin and become part of online transaction platform. Actually paypal is still widely used for payment affairs but it still will not bite bitcoin popularity.