I hope he knows, he will not leave PSG easily.
PSG never sell their best players, so if he signs a 5 year contract he is there til he is 30.
He'll be one of the richest Brazilians in the world if he gets to 30 years old at PSG. Doubt he cares that much about everything else. Your actions define you, and Neymar surely set his priorities straight.
In the end this is preseason usual stuff. We'll see which is which once the ball is properly kicked.