25 years old. Uncle on mom's side is bald. Both grandpa's and dad have a full head of hair.
Mostly concerned about the bottom of the crown area.
https://ibb.co/nDP7LLM
https://ibb.co/0Mb9w93
https://ibb.co/6gb1FdW
If so, should I start any treatment/is there something to prevent progression?
I think it's hard to tell, but experience tells me no. I'm a barber and I've seen crowns like this before, especially if they're combed like that. The best way to tell would be to cut it down to a 2 or 3 all around and then you'd really be able to tell if the density of hairs is changing.