Best we reserve judgement until their third party custodian, Paxos, provide evidence of full reserve.
Which they will never do, and even if they did, we have no way of verifying. Paxos supply an address with 1,000 BTC in it and say "This belongs to PayPal." How can we verify that Paxos isn't running a fractional reserve and that 1,000 BTC also "belongs" to a few dozen of their own customers as well? How can we verify that PayPal haven't actually sold 10,000 BTC to their customers, yet are only holding 1,000 BTC on Paxos? The whole system is just layers upon layers of blind trust.
PayPal has made it clear that they will allow withdrawals and payments using Bitcoin, once the testing phase is over.
Can you provide a link please? I haven't read anything along these lines.
So as a trusted platform for a long time
Whatever happened to "Don't trust. Verify."? The whole point of bitcoin is to not rely on trusted third parties. All you are buying through PayPal is exposure to bitcoin's price - you are not buying, and do not own, any bitcoin.