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'm not sure about this, because we know the value of bitcoin can change at any time. this is the factor that becomes the problem. and if PayPal accepts it in other words Amazon first accepts bitcoin in every shopping transaction.