Crossfit is a derivative of bodybuilding. I will give you the weak points of indoor bodybuilding and you will understand why crossfit is becoming more and more popular:

Indoor bodybuilding does not work on cardio

Few practitioners work on muscular endurance which is more important than raw strength

Most practitioners do the same exercises over and over

Crossfit does not have these weak points, it helps to strengthen cardiovascular condition, has a wide variety of exercises, works on endurance in addition to strength.

Admittedly, some exercises in crossfit are poorly executed (such as pull-ups), nevertheless this sport still has real benefits. Mat Fraser's Three Secrets to Being the Greatest CrossFit Athlete of All Time At the 2018 CrossFit Games, Mat Fraser proved he was the Fittest Man on Earth for the third year in a row.

Mat Fraser's the Greatest CrossFit Athlete of All Time: 3 Secrets to His Success. For the third year in a row, Mat Fraser proved he was the Fittest Man on Earth at the 2018 CrossFit Games. 

Rich Froning Jr. all time male crossfit athlete (born July 21, 1987) is an American professional CrossFit athlete known for his achievements participating in the CrossFit Games. He became the first person to win the title of "Fittest Man on Earth" four times with his first-place finish in the 2011, 2012, 2013, and 2014 CrossFit Games.

I would say bodybuilding for the following reasons I do things by myself, I adapt my training to my weaknesses, my little "wounds", my program, my goals I don't like the way of doing certain exercises in crossfit (kipping or deadlifts or burpees validated in competition which are no reps for anyone who knows how to do a deadlift or a burpee) I don't like the incompetence of crossfit coaches who push people to do things they don't know how to do (2 days ago I saw a crossfit coach push a girl to do a heavy deadlift on her 2nd session, at 60 kg her back was arched and completely horizontal, that did not prevent her from trying 70 kg just after. And when I took the coach aside to tell him that the person obviously did not control not the deadlift, the coach answered me, yes I know but she has back problems so that's why her technique is not good… it's serious). I don't like the idea of ​​pushing athletes by social pressure to do more reps than they know how to do on very technical exercises that are not meant to be repeated by completely degrading the technique (go do 20 reps on a snatch lol). Because I pay 21 euros per month for bodybuilding and crossfit is at least 70 euros per month (not to mention that you need the latest crossfit gear). CrossFit can be fun for people who need motivation and energy but it's not my thing