for speed, I prefer bitcoin, for security I choose paypal as absolutely safe
Everything is advantageous in one or the other form. Here when we think of bitcoin it has the fastest transaction as well high security. Likewise PayPal as a payment service provider has got few more guaranteed return services.
Both are not that bad, but as you can see now you see that Bitcoin is getting more used and that is nice for the currency itself and bad for paypal.
They are now going to use Bitcoin because you see also that it becomes more acceptable and that can be perfect, but the value have only to change.