Well, while reading at it. Bitcoin had been a challenger to paypal. Which is more useful and highly digitalized currency now? What do you think or which do you prefer? 
The tx fee is much higher for Paypal than bitcoin.
Is it? You can send and recive payments for free on Paypal and I often do,
You can easily lose your Paypal balance in a chargeback, and the dispute resolution is very bad IMO.
True, but there's also the flipside with bitcoin. If you lose your balance due to fraud or hacking those coins are gone forever and you're not going to get them back so swings and roundabouts really.