paypal will never accept bitcoin
They'll accept it the picosecond they think that they'll make more money if they do than they will if they don't. They'll be supporters of Bitcoin instantly if they conclude there's more profit to be had by supporting it than attempting to interfere with it. Whether they'll ever actually conclude that is the variable, but they're a corporation, they'll always do what they think will put the most money in their executives' pockets.
Exactly. The exact same reasoning applies to Visa, MasterCard, Discover, and American Express too.
The questions are "Who will jump first?" and "When?". PayPal seems very slightly more likely than the credit card companies to jump in first. But no idea when. Could still be years away.