You are right. From a static point of view, you are right when the currency value remains unchanged and there are no other good investment channels.

From a dynamic point of view, your husband devalues his currency and keeps more funds for other investments. This is also true.

So it depends on your plan and the actual situation in the future. If you are all young and have plans to start a business, invest in real estate or other aspects, your husband is right. Otherwise, you are right.