hello i was just wondering,is it possible to max out all skill for every character? I've been playing it for a long time  and i don't want to waste my skill points for a character that i'm not even gonna use. THANKS IN ADVANCE!!!

I don't think you can max out every character with just the skill points you found around the map, but i think you can farm skill points at the spire of courage.

Without farming the fire raid for days, you don't get enough skillpoints to max out all skills. But you can always reset skills and re-assign the skillpoints to something different.