I don't think Paypal will keep it this way for long, though.
What makes you believe so? It seems even payments will be settled in fiat:
Cryptocurrency payments on PayPal will be settled using fiat currencies, such as the U.S. dollar, meaning merchants will not receive payments in virtual coins, the company said.
If they're actually planning to go this route, there won't be any movements in the blockchain; they give you an IOU you can play with, and since it doesn't seem like they even give you a BTC address, it might be designed to stay that way. Neither you nor the merchant will ever touch any actual BTC.
I mean, I guess it's kind of smart since it appeals to people who only want to hold BTC for its price movements, letting them speculate
and spend with negligible fees. If I were a casual, I would absolutely gobble this up.
I feel a bit conflicted because on one hand, it has essentially nothing to do with Bitcoin, and could even harm
real adoption in the long run. On the other hand, it's huge for establishing Bitcoin as a legitimate asset class.