Bitcoin is decentralized and neither paypal nor any other payment systems can be. It is true that bitcoin had reached its limit last year but there are people that are continuously making solutions. Like segwit where fees were almost halve. Satoshi's promise was the white paper and when bitcoin went live on jan 3 2009, he already did his promise. All we need to do is to keep using bitcoin and believe on the core developers that had been working for years.