For someone that actually tried to make an Predator to endgame, i can say; it all depends on what is your goal in GF. Do you want to solo dungeons? Nah, Predator wont be your thing. Do you want to kill people in PvP? Predator wont be your thing. Do you like to grind and sell Plvl? Predator is extremely good! Do you like to capture chrystals / be support class? Predator is extremely good. Keep in mind, even though many players do not want to play a predator, the class is still a huge benefactor in certain modes, like GvG Jale or Kaslow. Also, a predator on lvl 100 (with pvp set) can get permanent mongoose buff, which gives damage reduce, invonerablility to stunn and evade. This makes the class extremely tanky, especially since you can use purple equipment after the procs used.
Now in my opinion, to really accelerate with a predator, you will need a lot of VFS items. Those costs literal millions of gold right now. Certainly the predator class isnt dead, but it needs a lot to be considdered good. If you want a challenge? Go try make it the best you can. If you just want a cheap class to lvl to 100 and use easily, focus on another class!
Hope this was helpfull