i think it bitcoin can be good payment system and payment gateway.there is no need third party to transfer your money.its peer to peer and safe.so it grow good payment system.
Yes I also think Bitcoin is the best way to payment system. Bitcoin give as a salary for jobs and next Bitcoin can transfer it fiat or paper money as usually.
The only disadvantage when you start using bitcoin as a payment system is that the value of it keeps on changing maybe what you're expecting to receive is lower than usual or the other way around. What you'll be paying or receiving totally depends upon the value of bitcoin, I think somehow you'll lose something but there are also times you'll gain something.