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.
1. I don't think, anybody hacked Paypal and just got a bunch of account-credentials out. They "hacked" on the user-site not on the server-site, e.g. installing keyloggers, phishing, etc.
2. What is the difference between a "Paypal USD accounts" and a "Paypal BTC accounts"? You have a Paypal-Account and you can store money there. I don't see how, the kind of money you store has any influence about, if you get "hacked"