Yes! Bitcoin can easily overcome Paypal.
Maximum 5-6 years!
The main reasons-
1. Paypal has very high fees. Whereas Bitcoin has negligible fee.
2. Paypal has several terms and conditions, Bitcoin is purely based on concept of decentralisation!

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That was a good factor how bitcoin will overcome paypal for me bitcoin will surely overcome paypal not now but in the few more years. We just have to wait for that and bitcoin have much cheaper when it comes on transacting and is very convinient to use

Yes this is possible for sure, I think that it can cross over paypal within some time for sure but we just need some patient.