I personally bought the Deluxe edition of Jurassic World Evolution on the Frontier Store while paying with USD. That saved me about 7 euros compared to the euro price.
It is a good idea to wait for reviews before you're going to buy a game. I have based my purchase on the excitement that I got from the huge amount of gameplay videos that are on YouTube, which are all made with development builds of the game. Also, IGN has some interesting videos about the game that are highly recommended if you are following news about this game.
Cheers Joel. I've not seen many of those videos, so that's probably why I'm not as excited. Will have a look and see how I feel then. [up]