I dont think so people are scared about using their credit cards and debit cards over the PayPal. Doesnt seem to me the case at all. Because thing is, PayPal is fiat based and its very popular as compared to the bitcoin itself. The service is trusted one and can not be missed or forgotten so easily. Also their payment solution is now available world wide with no single store left out of its portal. This means it is not replaceable at all and things once set in the globe are not replaceable by any other system so quickly. Bitcoin is not even known to half of the population for sure and most of them are not willing to even try it out. So I barely doubt that it will replace it.