Extreme green potion attack speed?

Except it's not, they are account tradeable. I have about 80 of each (except Gold) in my storage.

Gold ones are really rare, i'm pretty sure they have a low chance of dropping from any boss, but seem almost guaranteed to drop from the Gatekeeper Rhino boss that rarely spawns instead of the normal one.

I've gotten about 10 gold potions in total, and around 80 or 90 of the other 3.

what does that golden potion boost?