Umm.. PayPal will be providing their own service, which they would secure themselves. PayPal has never been hacked, and they get attacked WAY more than any Bitcoin service out there.
You are oversimplifying things. Thefts and hacking do occur with Paypal accounts. Go to SR 2.0, and you can buy a bunch of hacked Paypal accounts for just around
BTC0.2 or so. If so many hacks can occur with Paypal USD accounts, then imagine what will happen to the Paypal BTC accounts.