I've been collecting most of these that I can for the obvious rewards, but there are a LOT of them! I've often found a korok and not had arrows or whatever needed to collect the seed. I don't know if I could be bothered to go all the way back for 1 single korok seed. What do you get for collecting all of them? Is there any worthwhile incentive to collect all of the Korok seeds in breath of the wild?
There are 900 Korok Seeds in Breath of the Wild. Far more than you actually need in order to max out all of the upgrades that you can purchase with them. If you are a completionist and want to collect all 900 Korok seeds hidden in Hyrule, then you will probably be wasting your time.
Someone else has gone to the effort and collected them all. You literally get a piece of Hestus poo for collecting all 900. The article here will show you an image of what you get http://www.nintendolife.com/news/2017/03/heres_what_you_get_for_collecting_all_900_korok_seeds_in_zelda_breath_of_the_wild