Most of its value is in the energy in its orbit (not in its altitude). But to harvest it to use for something else you would need to change its orbit substantia

Most of its value is in the energy in its orbit (not in its altitude). But to harvest it to use for something else you would need to change its orbit substantially, which requires even more energy. It would only be worthwhile for large clouds of debris in mostly the same orbit, which tend not to occur.