i think PayPal will enter just after everything get regulated and goes mainstream, so we are talking about few years still.
When everything got regulated, utrust is already far left paypal in this technology and it will be so hard to compete utrust. Waiting for such regulations will force paypal to do nothing and let the other platform run fast.
Besides, who knows how the crypto world gonna look in couple of years. Regulations will mostly likely change something and as it is with everything it will be harder to enter the market. My guess is that we shouldn't be worried about PayPal at the moment.