Runescape Grand Exchange Party Hats

Party hats have been known to be increasing dramatically as the economy rises and party hats getting more and more rare the party hats are predicted to keep rising in price. Right now most of the party hats are over 1 billion and going up. The prices for party hats have been going up for a long time but lately they have been going up at a much faster rate they are currently the rarest items in the game, they have been out since runescape classic therefore they are so rare. And unless Jagex do anything like a holiday event with party hats/ Christmas crackers the prices of party hats will keep rising.