The item upon trade to finish the quest; Whither the Whisker, which rewards Crimson Abyssite of Celerity, is not lost after completing the quest, so if you obtain one, save it and pass it around your friends before selling it off.
You do know the Abyssite works Retroactively to multiply your current stones yes?
Say you have 20 Stones saved up, when you get this Abyssite you'll get "4hours" per stone worth a stone, complicated thought but what that basically means If you already had your first "Time" Abyssite you would go from 20 stones to 26 Stones.
You would lose nothing from waiting.
But that doesn't matter now, Tigers up on all servers and the Whiskers are like 30k.
So the smart people who waited can now buy their Whisker for 30k, get their stones multiplied too, so not lose anything, and didn't have to risk losing hundreds of thousands of gil chancing tiger pops on the server and prices crashing like a rock before you could peddle your whisker back off!