In fact, Primeval Titan has been the face behind some of the most degenerate decks in Modern, starting with the Cloudpost deck that was prevalent in the initial days of the format, to the Red-Green Valakut deck, and then the Amulet Titan deck both in its degenerate form with Summer Bloom, and the more toned down version we see today with Dryad of the Ilysian Grove and Urzas Saga
A few examples include: Log in Open 4 booster packs Reach Player Level 3 Trade Collect cards following certain themes, such as all Electabuzz & Magmar cards, all Kanto Starter Pokemon, all Eeveelutions, etc
Second, it helps thin your deck
The biggest drawback is timing: you still need to survive long enough to cast it on turn two
Another factor that impacts the longevity of Pokmon card investments is supply
And in the spirit of group hug, this does the trick