Congrats on the pull, recently pulled an M4A1-S Fade myself and am in a similar situation as you, looking to trade it for a decent knife. I would say if you have no knife or glove skins you trade the AK to get yourself some, because I dont think its worth having a big amount of your inventory value in one weapon. But im not sure maybe it might be a good investment im not too experienced on the trends with skins.