Though Modern is technically supposed to be an eternal, non-rotating format, that hasnt exactly been the case in the past few years
Each Type represents a different strategy, such as Fires strong but costly attacks or Grasss ability to tank big hits and heal away the damage
That being said, even with fraudulent bids being steadily removed, the card appears to be receiving a flow of genuine bids interested in acquiring it for well over $300,000 already, and it wouldn't be that surprising to see the price actually hit the $1,000,000 mark before the auction ends
The Golem, along with the other creatures mentioned above, means that it becomes incredibly tempting to run cards like Rite of Replication, Cackling Counterpart, Stolen Identity, and so on can you imagine casting a Precursor Golem, copying it with Riku, and then running out a copied Rite of Replication into a copied flashback Increasing Savagery