Plant it to grow Pepper Tree. The spiciest of trees. Well, I guess there's also cinnamon. Probably a lot of spices grow on trees, huh? I regret this entire description.
Pepper Tree Seed price in Growtopia: sells for about 30/WL (median of 31 offers from community Discords, past 30 days). Live price chart and the latest buy and sell offers.
Recently sold at: EPICAKE, SBAI2, TMAPD, VRNDS, ARROW