You will get robbed of everything. Stay away from Paypal, it would be safer to use a payment gateway for credit cards and risk that instead of this nonsense paypal escrow that's going to end up seized by them and you losing everything
People do trade BitCoins for PayPal. Some of them even use eBay for that purpose and pretty happy with the process despite eBay considers this a ToS violation and ends up the listing immediately once found. I also know there are dozens of stories how traders were ripped off by scammers on chargebacks, and (surprise!) payment gateway won't save you from being ripped. It's 100% the same - you get a chargeback and your merchant charges funds back from you. That's it.
There's NO 100% safe way to trade with reversible payment methods which PayPal, Credit Cards and ACH eCheck transactions are. Having that said, each and every advice to prefer one reversible method over another is a
worthless bullshit.
You should only consider the place where you're trading on and the person you're dealing with. Period.