What is the ruling on taking an interest-bearing loan to buy land in order to protect savings from currency depreciation? And what is the Islamic legal perspective on protecting savings from currency depreciation?

If the bank is interest-based (usurious), then it is not permissible to save money with it or to borrow from it. However, if the bank is Islamic, there is no harm in dealing with it by saving money or borrowing from it through Tawarruq, which involves selling a commodity you own and then selling it to someone else and benefiting from its price. There is also no harm in pawning savings as collateral for a debt. To avoid the depreciation of savings, one can invest money with Islamic institutions in permissible projects.