Are Party Hats and Other Rares Going Extinct?

Partyhats won't go "extinct" because of the fact that the videos are fake, almost nobody in the world performs alchemy with a partyhat in inventory. Some don't even equip a partyhat when they have alchemy runes in their inventory! So, Partyhats will not go "extinct", only reason the ever will is because RuneScape will shut down, or Jagex will take them out of the game. Of course, partyhats can't possibly increase in amount mainly because of the fact that they are now discontinued. Only reason they will increase is if Jagex decides to make more partyhats and then sell them in-game.