The Golden Potion is part of the "Gold Pack" that players were granted who bought the Early Access - version of Creativerse before it became F2P on November 11th 2015 with update R25.
The potion merely has a cosmetical golden sparkle effect for the player-character when consumed.
The Golden Potion can be crafted in your Crafting Menu (opened by "Q" as the default key) if you were an Early Backer and such have received the crafting recipe.
To craft 1 Golden Potion you'll need (as of R38 in January 2017):
- 1 (block of) Beeswax, found on trees, in Wood Treasure Chests or grown from Queen Bees
- 1x Yellow Pigment made of Yellow Flowers from Cragwood-trees in a Processor, or found in Obsidian Treasure Chests
- 1 Flower of any kind