Sorry but the crypto you "buy" in paypal remains in paypal. This is as useless as it gets... In fact, its a trap. So you think paypal is better than using your own wallet? I don't think so. And what good is a bitcoin that cannot be used, just sold again to them? This is so foggy, they can even "pretend" to acquire the coins while never doing so, or do fractional reserve practices.
Not to mention that, to even use Paypal, you need to have a valid credit card and perform a transaction with it to them which of course mean fully disclosing your ID.
Did you know there are countries in this world where you just can't acquire a credit card? Its often hard to own a bank account. None of that matters with Bitcoin. This is the old system that needs to go away.