Do whatever you want. It is one of the better packs you can purchase IMO as the % of getting a tournament dino are pretty good. I can’t remember what they are but around 60% give or take, I think?
In the end it comes down to what JWTG is… it’s a game. Typically you play a game to get enjoyment so do what ever gives you enjoyment from the game. I’ve done some pretty detrimental things to my game/park in the past just because I wanted something that wasn’t the best decision but it gave me some enjoyment, it’s nothing that can’t be fixed with time. And IMO spending 1500 DBs non VIP or whatever it is for Fidelity/VIP if you are one of those isn’t gonna make or break your game either way.
I’ve bought the 2018 pack twice on my game and once on my daughters game for fun. Sometimes i get board with this game just slogging along as non VIP and need a little excitement and unknown. It’s fun buying the packs, gives a little thrill especially because there are a few creatures in the pack I don’t own. I won a Gilacus (or whatever it is) once which I use all the time in aquatic PvE and the Super rare prize once. My daughter won the bear I believe. No regrets either time, I’d do it again but I’m typically not swimming in bucks they typically get used for hatchery speed ups as soon as I get them