Yes,but only if your pool is resin[that is constructed from 100% polymer or plastic].
It is not advisable to use salt in a "steel pool".
Answer.
Salt in a steel pool is a lousy salesman...
Probably not a good idea. an empty pool is always in danger of floating if ground water gets under it. If you do keep it while it is empty make sure the hydrostatic valve works and that no water is...
It should not have water in it, especially if freezing weather is expected. Drain the pool to below skimmer line and drain the filter and filtration equipment.