So I feel like the Prize Eggs/Nemo Bucks mechanic needs some changing. I'm level 100 and have 5200 Nemo Bucks that I'm not spending ATM, as I don't know when new skins/characters/outfits will be in the game or what we will have to do to obtain them. I know some outfits that are in the Prize eggs sometimes come up in the shop for purchase via Nemo Bucks. This is not the case with the all Prize egg outfits though, and certainly not the higher tier ones. I would like to suggest that all the Prize egg outfits rotate into the store at some point though.
I don't know if they'll add more chances for players to earn additional Nemo Bucks after lvl 100, I'm inclined to think not. There should be an option to just pay for what you want, especially since there are likely no options to earn Nemo Bucks after lvl 100. I don't have a problem with paying money for a really cool skin that I want, but I do have a problem with buying Nemo bucks, spending them all on Prize eggs, and then potentially not getting the outfit I want because it is RNG.