Board Thread:The Quarters - Q & A/@comment-165.106.21.112-20160706182103/@comment-24672610-20160706194229

Golden potions are much rarer than other potion types--each potion drop has only a 6.67% chance of being a golden potion. (See probabilities at Hatching Potions). Beyond that, it's just random chance. Keep completing tasks and you'll get more golden potions eventually! You can also buy them in the market with gems if you don't want to wait.