Sure, paypal is the big kid on the block right now, but who's to say they won't start accepting bitcoin as one of many international currencies?
(Edit: I just added "after 5 years" and "never" as additional poll choices.)
I think bitcoin is not need paypal to make transaction.
Bitcoin can take down paypal and people are starting to realize that.
For me, the best payment system is bitcoin but only the price spikes and more hacks that make people still afraid using it