Yeah, I think Bitcoin will change payment system on the world's in future. It will replace old system: Banks, Paypal, Visa... and become to a currency freedom, not managent by any country, anyone!
Bitcoin did everything and overcome different payment system as like you've said. Bitcoin is decentralized, no one could control the bitcoin. We can share it with everyone, we can use it as payment tools. Bitcoin has gradually changed and the main reason why created bitcoin to much easier to us to make money. In my own opinion, bitcoin will overcome PayPal and others, this is just my opinion! don't be serious on that one. I feel great confidence with bitcoin. I belong to the bitcoin community and I am so proud of it.