The material has a long service life and is one of the permanent materials. It is not easy to weather or corrode (although some patina will form, it is much better than steel and will not rust severely).
As a metal material, it features good elasticity and high toughness, allowing large volumes to be supported with only a few anchor points.
Sculptures are made hollow to effectively control weight. Especially for top-heavy works with a center of gravity far from the support points, the center of gravity can be adjusted by making the upper part as thin as possible and the lower part much thicker, making the structure more stable.
Overall, cast copper has many significant advantages over other materials.