TBH I don't think it's going to get much rarer in the next couple of months. There are ALOT of santas ingame and the only reason it rocketed from 30m to 100m was because of price manipulation people. It depends whether you're looking to buy something with the money or you would be selling just to make sure that you don't lose as much money. If you are looking to buy something; sell it. If not, then it's up to you whether you want to keep it to show it off and risk the profit.
all of the "smaller rares" crash around fall time lol i dont know how to spell aughust but thats when all the smaller ones crash, then they rise back up again shortly like last year, i bought a green mask for like 20m from some guy, then i sold it for cash and a d platebody then the acc i was on got hacked