It’s personal preference and no wrong answer. The way I see it is that I’m not putting my car in a show, so it really doesn’t make sense to protect it. I’m going to pound the piss out of the car with high mileage, so dings are going to a way of life. I don’t like it, but I can’t avoid them. It’s a work car, now a showpiece. I love my car dearly, but I have to accept it’s going to get some scars in life, just like myself.
For what it’s worth, I’ve had my car for over 2 years now and the paint still looks good. There are some dings, but most people won’t notice or care. Here’s something else I couldn’t avoid: stones cracking the sunroof. PPF isn’t going to stop that and frankly, with so much glass on this car, I’m more concerned about it cracking than worrying about the paint.
Enjoy the ride and spend your money on something more useful. YMMV.