Five emperors' money is an ancient money cast in Shunzhi, Kangxi, Yongzheng, Qianlong and Jiaqing years. These five emperors reigned in 180, which was the most glorious period of the Qing Dynasty. Whether the money of the five emperors is new or old depends mainly on your purpose. If it is used for geomantic purposes, the new five emperors' money can better meet its use requirements, while the old five emperors' money may be attached with dirty air after long-term use, which may have adverse effects. But if the money of the five emperors is used for collection, then the money of the old five emperors may be more valuable because they have a longer history and richer cultural connotations.
Generally speaking, if you plan to use the five emperors' money for feng shui, you'd better choose the new five emperors' money. If it is regarded as a collection, then the money of the old five emperors may be more collectible.