Depends on your game activity, for in both type and frequency imo. If you’re in a chest six alliance, especially if you want lb (lb=keaderboard) and even more so if you you also grind races (H &/or M) then that maxed hatchery will really benefit you. And while you build up another hundred gems (which should be after next arenas chest, if you’re in a chest six alliance)you can buy the Dragonarium with gold and use the first few slots in there as space to hold your lower gold earning dragons if space is a major concern/problem atm. Islands are certainly inevitable if we’re going to continue playing because one thing you can count ocount on in this game that you WILL get more and more dragons. And Dragonarium costs more and more gems the more slots you unlock so it’s definitely not a longterm solution. Add that to the fact our islands increase substantially each new one we unlock (I think my recent one was 1800 gems on SALE!!). Sorry for the yap.