Well is regulation & insurance of funds vs No regulation & anonymity
I don't think what paypal does means centralization, is just regulation, and who cares about the private key if you can prove the property and the funds are insured.
I'm a holder, i don't use btc to pay anything, just waiting, as i do with some other assets. Any investment can fail, and not meet expectations. But only in the case of btc I have to be worrying about hackers and companies without credibility. If you have shares deposited in a bank and bankruptcy, there are national funds that cover important amounts. But if this happens to you in the crypto world, you have lost your money
So I am really happy for the news of paypal, and I hope that more companies with their credibility continue to join the crypto world, where the current biggest problem is lack of credibility and insecurity